Cramer's Rule to Solve a System of 3 Linear Equations - Example 1

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  • Опубліковано 18 січ 2025

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  • @patrickjmt
    @patrickjmt  5 років тому +116

    Hi all! Please post comments, questions and anything else on your mind in the comment section! While I try to answer as many questions as I can, there are more questions than I can answer by myself so if you are someone who might be able to help, please do so! The community is so much better when everyone is involved and helping each other out. Our strength is our willingness to help each other!
    Also please feel free to like or dislike the video. Your feedback is always appreciated so that hopefully I can make my future videos the best possible! Thanks and happy studies!

  • @annelmoreno6862
    @annelmoreno6862 7 років тому +16

    Patrick, I honestly cannot thank you enough! I was crying in my college bathroom stall because I sat through a math lecture not understanding a single thing about Cramer's Rule and you literally saved my life. I appreciate all of the time and effort you put into these videos. They really do help A TON. Thanks again!

  • @javadhikmati4941
    @javadhikmati4941 11 років тому +377

    If the worst student had Patrick as their teacher they would probably got an A+ in exam. Well done boy!

  • @nathanherbertson8987
    @nathanherbertson8987 8 років тому +649

    Crazy to think people discover these methods!

    • @sadianadeem4223
      @sadianadeem4223 7 років тому +8

      Nathan Herbertson yeah
      How can they do this😵😵

    • @serajsersawi5786
      @serajsersawi5786 6 років тому +6

      baldy hardnut exactly, good that you practice that, keep it up!

    • @bernieberry1689
      @bernieberry1689 6 років тому +16

      Crazy to think people can actually do them

    • @quleughy
      @quleughy 5 років тому +4

      Sadia Nadeem I like to believe that all the great mathematicians were really just OCD but only in regards to math.

    • @offridevlogger7581
      @offridevlogger7581 5 років тому

      Yaa bro Legendary 🤘

  • @DinoMoonCreations
    @DinoMoonCreations 7 років тому +101

    Hey hey. I skipped litterly every lesson of vector and matrix math. So I try to figure everything out by myself in just 2 days. 7 years ago you made this. I dont know who you are. I dont know where you are. But the day that you decided to make this... was my the day you saved my life this day. I have a lot of papers with explaining of this. But this simple video was enough to finally let me understand it. I never thought it was this simple. THANK YOU RANDOM STRANGER!

    • @paids3764
      @paids3764 5 років тому +1

      He's saved many people, and helped me a ton as well. hats off.

  • @taninhanutry
    @taninhanutry 9 років тому +327

    You save lives with your videos, Patrick !

    • @patrickjmt
      @patrickjmt  9 років тому +58

      Just doing the best I can!

    • @TheSpartaMaMa
      @TheSpartaMaMa 9 років тому +6

      +patrickJMT yesss she is right.
      thanks man, nice writting btw XD

    • @theoslunds8297
      @theoslunds8297 8 років тому

      YES thank you!!!!!

    • @christopheralemao4352
      @christopheralemao4352 7 років тому +6

      tania posted this comment a year ago...is she still doing math ?! :O

    • @taninhanutry
      @taninhanutry 7 років тому +9

      Oh Yes!

  • @LuisKing150
    @LuisKing150 10 років тому +223

    if you were to teach at my university i would have major in math without a doubt been watching your vids ever since i was a sophomore in high school now I'm a junior in college :D

    • @informativecontent4778
      @informativecontent4778 6 років тому +4

      lolx i wish i found out about his vids earlier i would hv got good grades in maths

    • @zurzakne-etra7069
      @zurzakne-etra7069 4 роки тому +4

      wow! you're probably done with college!

  • @giulianavalia5315
    @giulianavalia5315 8 років тому +14

    My teacher doesn't explain things well, but you do! You have saved my life, sanity, and grades :)

  • @ferdusalamfahad8348
    @ferdusalamfahad8348 6 років тому +19

    I have become a big fan. Your teaching style is so cool.
    Love from Bangladesh ❤❤❤

  • @jmsolangi
    @jmsolangi 3 роки тому

    A uni student here....u have been my teacher crush since day 1 when I started watching ur vids... Here i said it... And whenever I try to teach, I have ur teaching methods and ways in my head... There should be a nobel prize for teachers or just give them quota in peace prize...they are life savers...saviors

  • @AmaanRizwan
    @AmaanRizwan 9 років тому +5

    Back from the semester exam, did this question so freaking right, all thanks to you. Thanks a million, Patrik !

  • @baman38
    @baman38 11 років тому +1

    Oh my gosh you just made this 50x easier than my teacher did in my 4 hour class. Watching this for 10 minutes will make me pass this class! Thanks a TON!

  • @upasnasharma1873
    @upasnasharma1873 4 роки тому +5

    I am an Indian and I usually watch only Indian tutors as I find them much more efficient and effective. I never trusted Foreign teachers as I found them beating about a bush. But ur a game changer man. Totally loved it

  • @MisterLiBRiUMz
    @MisterLiBRiUMz 12 років тому +4

    You my friend are getting me through 1st Year Uni Linear Algebra. Thank you for the videos, literally saving my life!

  • @RajeevSingh-kq8fl
    @RajeevSingh-kq8fl 4 роки тому +3

    This question can take a little portion of one question in IIT JEE exam of India, and still we have to solve the whole question in less than 1 minutes.
    Great explanation.

  • @Ameliyah_Tebz
    @Ameliyah_Tebz 2 роки тому

    i have been struggling with cramer's rule for days, wow !i can't believe that i am able to understand from a 10 mins video and i couldn't hear anything from my 2 hours class, Your explaination is so easy and straightforward , Thank you

  • @abdullaalshamali3930
    @abdullaalshamali3930 11 років тому +21

    i love you man
    i have been watching ur videos for 4 years now and you never let me down !
    keep it up bro and you will make a better mathematic generation !
    *thumps up*

  • @Pray4one
    @Pray4one 10 років тому

    Dude you're a freaking boss man...I wouldn't know what to do without your videos!

  • @MandhanAcademy
    @MandhanAcademy 8 років тому +51

    patrickJMT u r awesome

  • @margaritajunio5301
    @margaritajunio5301 9 років тому

    been watching your videos for several months. direct to the point explanations, love it.

  • @annuthapa5372
    @annuthapa5372 10 років тому +4

    You are just awesome. The way you explain, ur voice, and ur hand writing.

  • @souleymanedoumbia2616
    @souleymanedoumbia2616 6 років тому +1

    Now, I got my answer. Thank you so much! It s been a while now, I read and read and read again my class note on Cramer s rule, and I was not able to understand but after yours example with a 3x3 matrices (3variables), everything was going easily in my mind. Now, I m ready, for any nxn (n unknown variable) matrices, to solve. God bless you!

  • @patrickjmt
    @patrickjmt  12 років тому +6

    glad that you like my explanation!

  • @meridawatson
    @meridawatson 6 років тому +1

    YOU EXPLAINED THIS SO EFFORTLESSLY AAAAH!
    I have been trying to understand this for days! THANK YOU SO MUCH!

  • @MGNFilms
    @MGNFilms 11 років тому +89

    Why can't you be my university professor?

  • @Cramerica66
    @Cramerica66 13 років тому

    I really appreciate it when people like yourself make these videos to help us out. Not only on math but on other subjects and areas that often require some more explanation outside of the classroom.

  • @MrJefferson105
    @MrJefferson105 9 років тому +6

    thanks again you are miles better that my university lecturer

  • @Mr_Archer15
    @Mr_Archer15 6 років тому

    I want you to know that I love you bro, you helped me ace calc 2 after having to retake it and now your helping me with some more upper division. You're the real mvp :')

  • @56dragonfly
    @56dragonfly 5 років тому +4

    simplified such an otherwise rather difficult concept to get your head around, thank you!

  • @StarfieldRailway
    @StarfieldRailway 12 років тому

    Whenever I look up a mathematical principle on UA-cam, PatrickJMT is the first user name I look for.

  • @Brandon-ob9rg
    @Brandon-ob9rg 11 років тому +13

    Why does the order go + - +? What if the coeffient was a negative? Would you use a + instead of a -?

    • @miguel119x
      @miguel119x 5 років тому +4

      Just add the " ( negative number) " by the way I know I'm late but just in case someone

    • @eyad6159
      @eyad6159 5 років тому

      It has something to do with the vector product

  • @AS-ol6os
    @AS-ol6os 12 років тому

    Just one more thank you to add to the list. Ive searched several other sites trying to find this answer and no one explained how to do cramers method as thoroughly as this

  • @orionthehunter6428
    @orionthehunter6428 9 років тому +5

    I love your videos, everything is so clear and simple when you explain it, it really helps a lot. Keep up!

  • @anasaksooka
    @anasaksooka 12 років тому +1

    I was travelling away from my Country and been missing all my Math lectures but thanks to you I understood all what I have missed mate... you really make me consider just studying anything from just your videos :D

  • @ReinForceMent7
    @ReinForceMent7 8 років тому +11

    thanks bro. youtube is my teacher 😂

  • @marilynand2
    @marilynand2 12 років тому +1

    I agree with Anthony S... Your explanation is thorough and easy to understand. Thank you so much for sharing your talent/ gift!

  • @sharanv9182
    @sharanv9182 10 років тому +17

    damn awesome thanks man...but i cant stop laughing on 8:29 with the subtitles on

  • @cleomanloloyo1950
    @cleomanloloyo1950 8 років тому

    people are always gonna look at this video over and over again for help. Thank you so much :-)

  • @rajivnarayan4237
    @rajivnarayan4237 8 років тому +3

    Man Cramer saved the lives of people who need to computate imaginary numbers in matrix form

  • @b0ondockz
    @b0ondockz 13 років тому

    I'd be so screwed if these videos weren't available. I learn more in a 10 minute video nugget from you then I do in an hour and a half lecture on the same topic at my university. Thanks for making these videos clear and concise, and for your hard work. I hope they stay free.

  • @xenachan3479
    @xenachan3479 9 років тому +38

    thank u 😭

  • @pauladcl
    @pauladcl 7 років тому

    Thank you! I skipped my Math class due to health issues, now I’m getting ready for a quiz tomorrow by watching your videos. Kudos Mr!

  • @pwrlift
    @pwrlift 10 років тому +10

    i hav math test in exactly3 hrs from now and i havent study anything. im retaking paper (bcs im stupid enuf to fail) and i hope this will save me lol thanks youre my lifesaver

  • @connorharrington5414
    @connorharrington5414 12 років тому

    My lecturer literally confused me, after watching this it makes so much more sense!
    thank you so much! keep up the good work!

  • @SneakyBrownGuy
    @SneakyBrownGuy 9 років тому +11

    At 1:57 why did you get -8? Shouldn't it be 4 multiplied by 2 so positive 8?

    • @carterwelsh1065
      @carterwelsh1065 9 років тому

      SneakyBrownGuy the way to calculate it is: ((-3x0)-(4x2)) which = -8

    • @carterwelsh1065
      @carterwelsh1065 9 років тому +3

      Carter Welsh there should be a "-" sign between the (3x0) and the (4x2).. stupid google

    • @SlaYer-um7wb
      @SlaYer-um7wb 6 років тому

      it is because |a b|= ad-bc
      |c d|

  • @cekkie9443
    @cekkie9443 6 років тому +1

    Your example is much better than my text book's and lecturers'... thanks for help dude

  • @javellealcide942
    @javellealcide942 5 років тому +3

    I know i am 9 years ate...but why did you put a negative (-) before the 0 when expressing the determinant

  • @SOUbest2
    @SOUbest2 9 років тому

    you are better than any one.... if anyone get your tuition then anyone can get 100% marks.... I just love your teaching....

  • @abinayamirra7779
    @abinayamirra7779 5 років тому +3

    After our studies where should we use this method? 🤔

  • @oz6763
    @oz6763 6 років тому

    i cannot fathom how much better you are than professors out there who get paid much more

  • @WeberJohnny
    @WeberJohnny 10 років тому +39

    I always believe left-handed have better mathematics skill

    • @azeemkhan123
      @azeemkhan123 7 років тому

      Johnny Yuen yes right

    • @siddharthpatil6358
      @siddharthpatil6358 6 років тому +4

      Nope, u come to india u will come to know what is real mathematics

  • @DbzFighter02
    @DbzFighter02 12 років тому

    I'm a civil engineering student and I find this awesome! You rock Patrick!

  • @RavensPistonsLions98
    @RavensPistonsLions98 11 років тому +24

    You are a god

  • @seewababy786
    @seewababy786 7 років тому

    Patrick is freaking awesome. I've been teaching myself my entire semester of math for the final bc my teacher wasn't very good, and he's helped SO MUCH.

  • @xsith92x
    @xsith92x 10 років тому +4

    Thank you man!

  • @kevinmacharia2376
    @kevinmacharia2376 5 років тому

    Thanks Pat .....I really can't imagine i could ever understand this Rule and in only 10 minutes things have changed ....

  • @drop0bases884
    @drop0bases884 5 років тому +5

    🥺🥺🥺🥺🥺I still don't get it I wont play football bc I faild this class
    Give me a 👍up for hope bc I need it for the test

  • @sevdas3787
    @sevdas3787 10 років тому

    You are the best teacher I have ever seen, thanks for all videos !

  • @Dhreexlexic
    @Dhreexlexic 8 років тому +4

    Legend

  • @dhaliacarter2855
    @dhaliacarter2855 9 років тому

    you've saved my life for the hundredth time, thanks patrick your videos are the best

  • @hamonyqueso699
    @hamonyqueso699 10 років тому

    Got a test tomorrow on this and i literally was zoned out the entire topic lol this helped alot thanks! :)

  • @patrickjmt
    @patrickjmt  13 років тому +2

    @suplottie glad i could help, come back any time : )

  • @Omegadad99
    @Omegadad99 9 років тому

    Oh my gosh. you made this so much easier for me. The notes online made by my teacher are just not even close to what you did. Thank you so much

  • @patrickjmt
    @patrickjmt  13 років тому +1

    @colefae glad i could help :) come back any time!

  • @amandaszampias
    @amandaszampias 7 років тому

    I got my math minor. Have to say thanks to PatrickJMT for his videos helping me from senior HS courses to senior college courses.

  • @ndekerekiritu1277
    @ndekerekiritu1277 5 років тому

    Wow. The video was uploaded in 2010 and 9 years later, its still super-useful! Hats-off,,,

    • @patrickjmt
      @patrickjmt  5 років тому +1

      yep, the math is still correct :)

    • @ndekerekiritu1277
      @ndekerekiritu1277 5 років тому

      @@patrickjmt Thanks for replying. I feel special... Anyways, I have this cat on Friday (Linear algebra). Hopefully, i'll apply what I learnt from this video :-)

  • @chemistrykicksass
    @chemistrykicksass 12 років тому

    And once again you helped me to understand the way of solving this problem. Time for some donation!

  • @Koqes
    @Koqes 3 роки тому +1

    best tutorial ive seen

  • @maalindiyasara6838
    @maalindiyasara6838 2 роки тому +1

    Great explanation.from sri lanka🇱🇰❤

  • @SOUbest2
    @SOUbest2 9 років тому

    you are just awesome....
    hats off to you man..... just teach us like that.... We are following you.... you are a great teacher....

  • @KhasiInfoGraphics
    @KhasiInfoGraphics 4 роки тому

    Thank you so much sir now I know how to solve Cramer's rule 😁😁

  • @nkamsehsomebodyvincentbons6762

    OMG THIS REALLY HELP ME IN MY LAST TEST IN SYSTEMS OF LINEAR EQUATION AT THE MATH TEST CENTER THANKS

  • @Farrisspoiler
    @Farrisspoiler 11 років тому

    Totally Respect for this user ! he save my life ! because tommarow is my exam ! .And i want to lean cramers RUle ! :) Respect !

  • @Wheepupsdimple
    @Wheepupsdimple 10 років тому +1

    thank you so much! major quiz tomorrow and I learned more from this video than from my college prof! THANK YOUUU

  • @TheGainfulGamer
    @TheGainfulGamer 8 років тому +2

    Thanks so much for the video! Helped explain this a lot. My only question is, why use Cramer's Rule if it takes so long to determine x,y, and z? Surely, the other methods are far more practical.

  • @jayashreesampath4482
    @jayashreesampath4482 3 роки тому

    OMG! simplest explanation i have ever heard/seen. Thank you!

  • @AmaanRizwan
    @AmaanRizwan 9 років тому

    Thanks a million. You taught with simplicity. Having end semester exam the day after tomorrow. Surely going to do this kind of question right.

  • @soxredsox
    @soxredsox 12 років тому

    i have an Asian professor with the thickest accent you will ever hear in your life and on top of that hes really smart and doest teach in a simple way to get his point across in a way students will learn. I had absolutely no idea wtf was going on in class (btw its def eq and linear alegra) and my test is in two days. now i feel like i have a fighting chance on that test. I could literally kiss you. Thank you so much!!!!!

  • @danny1044xbox
    @danny1044xbox 11 років тому

    Good tutorial man. You are a good teacher, make things seem way easier which stops many students panicking before an exam. I am thinking about starting Maths tutorials too. Thanks.

  • @catherine_chipa
    @catherine_chipa 4 роки тому

    Ohhhhh wowwww.. my inclass test is within an hour and wow did you save my life. Thankkkk youuuu

  • @nepistic__1118
    @nepistic__1118 4 роки тому +2

    Wowww😆...I was really pissed after not knowing it thanks 😊❤️

  • @HaseebZamanKhan
    @HaseebZamanKhan 13 років тому

    sir you are awesome. literally i was going through some books but didnt get it. and u made my life easier in only 10 mins. Many thanks

  • @samuelmendieta
    @samuelmendieta 5 років тому

    Great video Patrick! I love the use of different sheets to make it easier to see the process. Thank you!

  • @millerzhang6871
    @millerzhang6871 10 років тому

    you are so amazing really!! i didnt understand single thing my professor taught in classes. after i watched your videos i feel so confident. midterm is in 2 hr, wish me luck:)

  • @sidneykantor
    @sidneykantor 2 роки тому

    Really nice video and easy to follow. I really like the simplicity of it...pen and paper! You have a new subscriber.

  • @7arbif15
    @7arbif15 7 років тому +1

    Hey Patrick, god bless you , thank you from my heart.
    Love U from Saudi Arabia 🇸🇦💚

  • @sgarcia8337
    @sgarcia8337 8 років тому +2

    Thanks for helping me with ODE.. You are super kind and cool for all these amazing videos..

  • @zubeirjamaa
    @zubeirjamaa Рік тому

    Thanks so much! I’m taking Linear Algebra online and the textbook doesn’t explain things too well. Your videos are goated

  • @mishaal93
    @mishaal93 5 років тому

    I love you man, you just saved me a whole grade in my numerical course!!!!!!!!!!!!!!!!! Thank you a lot!!!

  • @kojuntan
    @kojuntan 5 років тому

    Thanks for the explanation, you are the greatest gift to this world. Hope you stay healthy and live a long life to pass on your knowledge to others too!

  • @petaiacoka2485
    @petaiacoka2485 4 роки тому

    This guy is by far one of the best math UA-camrs in History

  • @mayastaton9816
    @mayastaton9816 6 років тому

    crash studying for my midterm and this just saved my grade. Thanks so much!!!!!!

  • @winkela617
    @winkela617 10 років тому +1

    You just saved my life, I am eternally grateful!!!

  • @donsaviophilip
    @donsaviophilip 6 років тому

    I thought it was my greatest mistake of bunking the classes.......Now I am so confident to do so cause now I know I've got a better teacher!

  • @christopherjensen2784
    @christopherjensen2784 3 роки тому

    Thanks for the help Patrick,
    Your explanations are easy to understand and your writing is clear.
    Chris J.

  • @davidladu7159
    @davidladu7159 10 років тому

    With you Math is a piece of cake. Thanks a ton, Patrick! You are the best :D

  • @knoz35
    @knoz35 9 років тому

    Patrickkkkkkk, i passed my exam with very high scores. God bless you :)

  • @pinkydummyxoxo1453
    @pinkydummyxoxo1453 6 років тому

    THANK YOU SO MUCH. I STRUGGLED A LOT WHILE DOING THIS! THIS VIDEO SAVED ME

  • @felixmosigisi2991
    @felixmosigisi2991 9 років тому

    I had some exam today and this greatly assisted me...thank you

  • @realcatboy1263
    @realcatboy1263 4 роки тому

    You are now my teacher during quarantine