Algebra 38 - Why the Elimination Method Works

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  • Опубліковано 24 гру 2024

КОМЕНТАРІ • 33

  • @jamestaylor1741
    @jamestaylor1741 10 років тому +12

    Simply incredible. As someone who has worked with schools for +25 years I can tell you that math is the number one challenge most students face. For students who do not understand Algebra it can appear as if teachers are pulling solutions out of thin air, or making them up as they go along. Your videos do an incredible job of explaining where these solutions come from while providing the viewer an understanding they themselves can retain and use to solve equations.
    I've watched Why U spread like wildfire across schools here in Florida. I truly hope the US Department of Education climbs on board soon. Far too many of our students are walking into college wasting time and money having to take basic per-algebra and algebra classes over again.
    Kudos to Why U for giving our students such an incredible, and free, math resource! Well done Why U staff.

  • @axsmasher4
    @axsmasher4 2 роки тому +1

    The amazing thing is, this was never explained to us in class and we didn't even question it at that time. Thanks, great video!

  • @pablosantana3173
    @pablosantana3173 4 роки тому +8

    What a fantastic channel

  • @sighisoaraa
    @sighisoaraa 8 років тому +1

    This also applies to substitution. By solving for a particular variable in an equation and substituting that variable into the other equation, we create a line that goes through the intersecting point of the original two equations.

  • @hardani.ismunabil
    @hardani.ismunabil Рік тому +2

    this concept really enlightened me on the works of why elementary transformation on a matrix form system of linear equation doesnt change the solution...
    maybe i phrase that wrong, but i find that this lecture very useful, thanks for that 🙏😁✌️

  • @BU3000F
    @BU3000F 9 років тому +2

    Your videos are very helpful and the best on UA-cam. I wonder if u recommend a specific maths book for only practice alongside your videos?

    • @MyWhyU
      @MyWhyU  9 років тому +4

      el_7amani Three Algebra textbooks you may like with useful examples and problems are: "Intermediate Algebra with Applications & Visualization" - Rockswold & Krieger; "College Algebra in Context" - Harshbarger & Yocco; and "College Algebra" - Cynthia Young

  • @guruappeal3239
    @guruappeal3239 10 років тому +1

    I really like this channel! Been subbed for a long time keep going!

  • @mariacorazonlomibao7930
    @mariacorazonlomibao7930 9 років тому +1

    Very helpful in introducing the elimination method of solving systems of equations

  • @mohammedhafiz3137
    @mohammedhafiz3137 2 роки тому

    Best technical explanation of maths subjects channel on you tube. Thank you so much

  • @arifkizilay
    @arifkizilay Рік тому +1

    Hi, (at 3:29). Just to be clear, I believe A1 is the y value, and A2 is the x value. Likewise, B1 is the y value, and B2 is the x value. So when we add the two equations, they have the same x and y values in the equation produced by adding the previous two equations. Have I understood correctly? Thank you.

    • @tbhaxor
      @tbhaxor Рік тому

      No A1 is the just "some value" of computation of LHS of equation A and A2 is the RHS constant of equation A. So A1 = 3x - y and A2 = 3. Similarly for B2 equation.

  • @chimwemwechinamale6716
    @chimwemwechinamale6716 2 роки тому +1

    This video should have 1.2B views and 1B+ likes

  • @gnork973
    @gnork973 2 роки тому +1

    Uni just started and the second question in linear algebra was “why does it work?”
    Thanks xD

  • @jkgan4952
    @jkgan4952 3 роки тому

    Beautiful. What a lucky man I am to find a channel like this. Loving it! Thanks :)

  • @sriraghavtanikella
    @sriraghavtanikella 3 роки тому +3

    This is technically the gaussian elimination method.

  • @arifkizilay
    @arifkizilay Рік тому

    hi, more precisely, what is the meaning of "both expressions in equation A have the same value?" thank you.

  • @Latif.Kakule
    @Latif.Kakule 4 роки тому +3

    Thank you so much.. why don't teachers give us this type of logic?

    • @CRISTIANO18786
      @CRISTIANO18786 3 роки тому

      The explanation seems simple because of the way it is presented. You have no idea how much in depth knowledge you need in order to explain complex concepts in plain English. Not every teacher has that kind of profound knowledge.

  • @AlessandroZir
    @AlessandroZir 3 роки тому

    u r the most insightful math professor I ever had! danken, professor;

  • @vrd8991
    @vrd8991 Рік тому

    Your content is amazing, I am glad to have found your channel !

  • @Tiger-789
    @Tiger-789 4 роки тому +2

    Thank you, this is very clear and easy to understand :)

  • @punjwanishahroz
    @punjwanishahroz 3 роки тому

    very helpful and intuitive! thanks a ton for making this effort to explain the logic :)

  • @djcaly84
    @djcaly84 8 років тому

    So, the multiplier is rotating the lines about the intersection point. Is that true?

    • @MyWhyU
      @MyWhyU  8 років тому +3

      When two linear equations whose graphs intersect are added, the NEW equation which is produced will have a graph that also passes through the same intersection but will be rotated from either of the original two equations. The angle of rotation will depend on what multipliers are chosen for each of the original two equations before they are added.

    • @truthalonetriumphs6572
      @truthalonetriumphs6572 4 роки тому

      Rotation depends on the ratio of the multipliers applied before adding the two equations. Correct?

    • @adolfocarrillo248
      @adolfocarrillo248 4 роки тому

      @@truthalonetriumphs6572 where did you saw that, I remember from a tutorial here in UA-cam But It dont remember where. Can you share the link please?

    • @truthalonetriumphs6572
      @truthalonetriumphs6572 4 роки тому

      @@adolfocarrillo248 it seemed logical that that's the case ... i don't think i saw another video ... we can try multiplying the second equation by -1, -2, -3, -4 etc and adding to the first equation and plotting the resulting equations at desmos. com and visually see the rotational effect.

    • @adolfocarrillo248
      @adolfocarrillo248 4 роки тому

      @@truthalonetriumphs6572 Yeah you have right, I was a little stock in that. Thaks for your response. Keep healthy.

  • @wayraa
    @wayraa 10 років тому

    great videos!!! thanks!

  • @Trunks47r786
    @Trunks47r786 10 років тому

    Thank you very much. This helped me immensely.

  • @MegaMementoMori
    @MegaMementoMori 10 років тому

    Now... what would happen if we added 2 equations for parallel lines? Trololololo

    • @MyWhyU
      @MyWhyU  10 років тому +10

      Adding two equations which describe parallel lines, produces an equation describing another parallel line half-way between the two original lines.