I was trying to solve a system on math xl for over an hour and was never getting the exact decimal answer until I did it the way you suggested. Thanks for sharing it.
Thank you!!! Super helpful! I just spent 4 hours on the same homework problem and no matter what I do I cannot master the Gauss-Jordan elimination method for solving equations in matrices. This is sooo much simpler! Any as for whoever made fun of you for differentiating between the minus and the negative keys, I spent a week thinking I had a defective calculator because I couldn't get a valid line graph function because I was using the minus key instead of the negative. Very Helpful!
omg i can finally do chapter 5 in my math book the easy way!! my lame professor didn't know how to even work it on calculator so he made us do it the hard way O_O all he said was if we know how to do it on the calc to go ahead on the test it would be okay -.- YOU ARE A LIFE SAVER SIR!!
Nancy De Castiel Hey that's really great. Let me guess- the three equations & three unknows. Those are killer unless you're a Jedi Master with algebra- or know how to use matrices to do it. Awesome!
Hi Fabiola, thanks for watching my video! Yes, you CAN access the matrix menu faster. On newer TI-84s, such the color, and TI-84s with OS version 2.54 or newer, the ALPHA-F3 will pop up the Matrix menu. You can directly enter matrices for quick calculations. However, if it's a large matrix, you should stick with the regular method shown in the video. Good luck with everything!
As a teacher, I've seen it plenty. Students think the TI calculator should "just know" what you mean the same way that iPhone "magically" corrects your texting spelling mistakes. The negative symbol and subtraction symbol just confuse some people...
Thanks for the video, but there were some steps where you were just quickly pressing buttons without explanation. This made it a little hard to follow at times.
Yes, that's a confusing thing, I agree. To delete a matrix, you actually go into the "MEM" (memory) menu and go into #2, "Mem Mgmt / Del..." then choose #5 matrix and you will see a listing of all your matrices. Select, and press the DEL key to delete.
When you show people how to solve the systems of equation around the 5:50 mark, instead of having a 3 X3 matrix and then 3X1 matrix, you could've just created a 3X4 matrix and just throw in all the coefficients of all the terms and your 4th column would've been the constants of the equation. Then you could've used rref(A) and it would give it to you. It's still a good vid with all the other info.
Sort of. You would have to write a program to do formula operations, which DOES take work, but it is the enter-once-do-many-times kind of thing you're looking for. I will soon have a program posted that can do determinants and inverses and great stuff like that.
So what if you have matrices A, B, C, and D with orders 2x3, 2x3, 3x2, and 2x2, repetitively, and are trying to find the orders of operations, such as: A(2B) D(A-3B) (BC-D)A
Did you really think we would be doing matrices if we didn't know the difference between the subtraction and negative buttons? Haha. But thanks. Helpful video :)
I ran into a problem with using my TI-84. How do we scroll down on a matrix in the answer on the TI-84? I can only see 6 rows of my 7-row matrix. Help?
Hi, can I save a previous matrix result for a further operation? I'll clue you thru my problem. I have matrix A and B. First I need to mutiply A x transposed(A). Lets call the result as C. Then I have to multiply B x transposed(A). Lets call this D. Finally i need to multiply D x inverse(C). I want to now if I can store C and D in the TI memory, without having to write down the numbers and type again
Can I also calculate something like f(x1,x2) = x^2-4xy+x-2xy^2+y-4 Im searching for the Hess-Matrix of A at (2 over 0). What is a11? Now do I control that ?!
I did not see what buttons you were pressing to do addition and multiplication of matrices so I am still confused...and I have a test on this on Monday and a final exam in my college algebra class on the 12th, so I need the info. Thanks!
oh my goodness! you just saved me soooo much time and stress. Like you probably will never know how much you helped me for my math quiz and test. thank you =D Did it very well btw.
I was trying to solve a system on math xl for over an hour and was never getting the exact decimal answer until I did it the way you suggested. Thanks for sharing it.
Thank you!!! Super helpful! I just spent 4 hours on the same homework problem and no matter what I do I cannot master the Gauss-Jordan elimination method for solving equations in matrices. This is sooo much simpler! Any as for whoever made fun of you for differentiating between the minus and the negative keys, I spent a week thinking I had a defective calculator because I couldn't get a valid line graph function because I was using the minus key instead of the negative. Very Helpful!
Thank you so much! My math teacher has a very weird way of solving it that requires excessive writing and steps. This helps sooo much.
Great video Andrew. You explained this concept so much easier and more clearly than my math text book did. Thanks.
just tried to do this on paper for a good hour DX. You're a king
Holy crap I've had this old sucker for five years and I barely learned how to matrix on it, thanks!
omg i can finally do chapter 5 in my math book the easy way!! my lame professor didn't know how to even work it on calculator so he made us do it the hard way O_O all he said was if we know how to do it on the calc to go ahead on the test it would be okay -.- YOU ARE A LIFE SAVER SIR!!
Nancy De Castiel Hey that's really great. Let me guess- the three equations & three unknows. Those are killer unless you're a Jedi Master with algebra- or know how to use matrices to do it. Awesome!
Andrew Borne YES. i absolutely hated it and i managed to pass the final too so thanks so much!
Thank you for explaining in 10 minutes what my professor failed to explain in 5 videos.
Thank you i just came back from doing a test and id like to thank you for this video it really helped alot!
thanks for augment/enter key, but which key said RAM clear[good-bye, stored matrices?]
Is it possible to enter a formula into a matrix, such that you only need to enter the matrix one time and can feed the variables new values?
How can i find a determinant when the member of a matrix are complex
having issues with imaginary numbers in the matrices.. will it not work? long hand algebra during a EE test is no bueno..
In the official manual for the ti 83 says that only real numbers are allowed in the matrices for this calculator ti 83
how do i multiply matrix a and matrix b but subtract matrix c on the ti-84 plus?
You saved my life. THANK YOU!!!
hey man umm what does it mean when i'm at the end and it goes like: " ERR: SINGULAR MAT" ? please respond iin the next 24 hours. thanks :D
what if the last equation only has 2 terms? do you sub in 0 for the non existent term?
Do you know if we can access to a shortcut menu for matrices on ti 84 plus? It will make things easier and faster...
Hi Fabiola, thanks for watching my video! Yes, you CAN access the matrix menu faster. On newer TI-84s, such the color, and TI-84s with OS version 2.54 or newer, the ALPHA-F3 will pop up the Matrix menu. You can directly enter matrices for quick calculations. However, if it's a large matrix, you should stick with the regular method shown in the video. Good luck with everything!
Thanks for the video, it really helped.
Thank you very much from Japan.
Could you just enter a 3 by 4 rather than combining two?
+Ivan Tchesnokov likely too late, but yes you can.
Thank you so much you saved me so much time
up to how many dimensions can it solve?
sneha timilsena I’m not sure but I’ve seen 10x10
great video, very clear, u should go through all of the matrix math functions. :)
This Definetly helped ALOT!
was trying to follow taking the inverse of [A] procedure but ......
Saved my life!!
Thank you sir. That was most helpful.
This was great, thank u
Excellent, Thanks
Thank you kind sir 🙏
Thank you so much!
nice one
Thanks so much!! You are a lifesaver :)
really helpful, thank you!!
SOOOOOOO HELPFUL!!!
Thank you!
Thank you
life saver
Thanks!
THANK YOU SOOO MUCH!!!! ^^
THANK YOU!!!
OMG thank you so much
You are very welcome. Luck with with your math!
Andrew Borne thanks!
You get a like for pronouncing “primer” correctly in this context.
(Edit) But you lose it for not including the row operations I was looking for.
I"m not British but I've watched enough Downton Abby to know how to say 'primer' correctly. :)
it´s so simpel my english is not very good but i understand all absolutly perfect!
Sooooo confusing! you are making moves you are not explaining. I cannot follow.
I want to kiss you right now.
basic primmer.
As a teacher, I've seen it plenty. Students think the TI calculator should "just know" what you mean the same way that iPhone "magically" corrects your texting spelling mistakes. The negative symbol and subtraction symbol just confuse some people...
THANK YOU! I was literally about to smash my calculator with a hammer.
+steve You're welcome, Steve. Good luck on your studies!
awesome----u really know how to teach-----pls more of every thing!!!
You just helped me with my midterms tremendously! Thank you so much!
I shared this video with my classmates! :)
This is great! I think a lot of students will benefit from this tutorial.
Thanks for the video, but there were some steps where you were just quickly pressing buttons without explanation. This made it a little hard to follow at times.
5:20 - solving system with three variables.
Thanks for the tutorial. Good stuff.
You're welcome. Since I'm answering a year after your comment, I hope all went well and you passed your class! -Mr. Borne
Yes, that's a confusing thing, I agree. To delete a matrix, you actually go into the "MEM" (memory) menu and go into #2, "Mem Mgmt / Del..." then choose #5 matrix and you will see a listing of all your matrices. Select, and press the DEL key to delete.
"To enter a matrix" two hands extend with two pills
i have a freakin TBI and you rock; i've spent 4 weeks working on how to find the augmented matricies; THANK YOU
welp, that concludes my math homework. Thank You. All courtesy is due..
Concise and clear, thank you very much!
When you show people how to solve the systems of equation around the 5:50 mark, instead of having a 3 X3 matrix and then 3X1 matrix, you could've just created a 3X4 matrix and just throw in all the coefficients of all the terms and your 4th column would've been the constants of the equation. Then you could've used rref(A) and it would give it to you. It's still a good vid with all the other info.
Can we enter 10x10 matrix on TI-84+ ? I want to buy it for Adjustment Computation and Error Theory and Parameter Estimation.
+Adventurer2511 Sorry, the TI-30XS Multiview can do some TABLES stuff (great for statistics, and cheap) but not matrices. :(
Sort of. You would have to write a program to do formula operations, which DOES take work, but it is the enter-once-do-many-times kind of thing you're looking for. I will soon have a program posted that can do determinants and inverses and great stuff like that.
Awesome explanation, very clear and immensely helpful! Thanks!
So what if you have matrices A, B, C, and D with orders 2x3, 2x3, 3x2, and 2x2, repetitively, and are trying to find the orders of operations, such as:
A(2B)
D(A-3B)
(BC-D)A
Did you really think we would be doing matrices if we didn't know the difference between the subtraction and negative buttons? Haha. But thanks. Helpful video :)
I ran into a problem with using my TI-84. How do we scroll down on a matrix in the answer on the TI-84? I can only see 6 rows of my 7-row matrix. Help?
How do you delete matrices A, B, and C after youre done? I've pressed delete and clear when under "EDIT" and "NAMES" to no avail.
Hey. Does anyone know how to convert the matrix values to an exact fraction? Help is appreciated.
nice video! you can also use Linear Algebra Toolkit and it will show u how to work the problems step by step!!! :)
thank you sooooo much. i really appreciate it. could you also do some more videos on tricky things. thanks
That error message results when you try to take an inverse of a matrix which has a determinant of zero, which you cannot do.
You are a life saver!!
Thanks g saved me some time on my test!
Thank you very much ! you helped me out with this video
What are the key strokes for storing the augmented matrix in "C"?
M M matrix > math> augment(7) > [A], [B]> sto > matrix C. Sto is above on
Hi, can I save a previous matrix result for a further operation? I'll clue you thru my problem. I have matrix A and B. First I need to mutiply A x transposed(A). Lets call the result as C. Then I have to multiply B x transposed(A). Lets call this D. Finally i need to multiply D x inverse(C). I want to now if I can store C and D in the TI memory, without having to write down the numbers and type again
how do i clear the matrixes!!
hi im thinking about buying calculator like this, but i need it for big matrices abot 19x16 can it handle matrix like this ??
jks380 , Yes, it can. But are you sure this is the right tool to do your huge matrix math? It may be easier to use software on a computer.
Why go through the process of augmenting it when you could have just made matrix A a 3 x 4 and just rref it from there?
You are correct. I wanted to show you that the calculator could augment if you needed to.
Can I also calculate something like f(x1,x2) = x^2-4xy+x-2xy^2+y-4
Im searching for the Hess-Matrix of A at (2 over 0). What is a11? Now do I control that ?!
thanx a span!! watch?v=boK_8kkYLCA is also gud.. keep up helping us...
12 years later and I’m still using this
I did not see what buttons you were pressing to do addition and multiplication of matrices so I am still confused...and I have a test on this on Monday and a final exam in my college algebra class on the 12th, so I need the info. Thanks!
which means that it is inconsistent right?
thank you so much. thanks for sharing it.
Technically the negative symbol and subtraction are one in the same as when you add a negative it subtracts. However I see where you are getting at.
oh my goodness! you just saved me soooo much time and stress. Like you probably will never know how much you helped me for my math quiz and test. thank you =D Did it very well btw.
Very nice work. Thank you!!
this is great. thanks for sharing.
I finally understand this! thanks!
Thank you for this video, I am not very good at algebra so I try to find alternative ways on my calculator and most of your videos help me a bunch
Great , helped me a wicked lot.
OH MY GOSHHHHHHH!!!! Thank you so much! This video helped me so much! I figured out my 10 points extra credit! YAY! :D
I'm trying to solve a 3 equations 3 unknowns with fractions but it keeps on giving me 0 for the answer.
Thank you so much. Your a blessing!!!! Can not understand my math instructor. So glad you shared this....
5.35
exactly what i wanted
Thank you soooo much. You dont even know whow much you helped me! Me, a french student ! :)