The Factor Theorem

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  • Опубликовано: 24 дек 2024

Комментарии • 45

  • @1stClassMaths
    @1stClassMaths  Год назад +42

    I knew because I designed the question. I am just using it to demonstrate the theorem. In the exam they will not expect you to work out the factors without giving you one first.

  • @cyv.er08
    @cyv.er08 8 месяцев назад +11

    Most underrated gcse math tutor

  • @camerongrinnell-wright9250
    @camerongrinnell-wright9250 9 месяцев назад +30

    This channel is 1x10^100000 better than my actual teachers.

    • @1stClassMaths
      @1stClassMaths  9 месяцев назад +15

      Write this as an ordinary number

    • @fundycool1089
      @fundycool1089 8 месяцев назад +2

      1,00,000 million (prob)

    • @yeetusnoodle
      @yeetusnoodle 7 месяцев назад

      Way more ​@@fundycool1089

    • @ronynkrumahzakaria5926
      @ronynkrumahzakaria5926 5 месяцев назад +5

      That's not too nice. I'm sure your teachers are also trying their best.

  • @CB-gl8qm
    @CB-gl8qm Год назад +9

    Thank you for running through this - you are really clear at explaining it :)

  • @Maxtreon.
    @Maxtreon. 6 месяцев назад +3

    Why is this channel underrated.
    Thanks man

  • @joeyramstad8529
    @joeyramstad8529 4 месяца назад +1

    thank you so much for this! reviewing my pre-calc in preparation for university calculus after a five year gap and this was for some reason one of the hardest concepts for me to remember. my textbooks and other online resources just couldn't explain in a way that made sense to me. This video helped recover faith that I'll be able to do this!

  • @currytut455
    @currytut455 25 дней назад +1

    nice work i did not know that, very helpful

  • @humayunmirza6835
    @humayunmirza6835 Месяц назад

    Beautifully explained as always. My son's school teacher recommended your video channel! Thank you.

  • @Amber_malik776
    @Amber_malik776 Год назад +6

    at 5:40 how do you know so surely that 3 in a factor is there a method to work it out in the exam

    • @NeonGlitch
      @NeonGlitch Год назад +1

      he may just know it from before to save time - in the exam youd have to use trial and error to find the factors

    • @fungo..
      @fungo.. Год назад

      was wondering the exact same thing

    • @Kloogus
      @Kloogus Год назад +2

      He said in the video that itd take too long to go through each one, so he chose the one that he knows is a factor, and its a factor because once subbed in for x, it = 0

    • @billieeillishissofuckinvha5139
      @billieeillishissofuckinvha5139 Год назад

      he said in previous comment that they will tell u a factor in the exam
      😊

    • @Morpeth_Harriers
      @Morpeth_Harriers Год назад

      They give you a factor in thr exam and make you prove it’s a factor

  • @humayunmirza6835
    @humayunmirza6835 Месяц назад +1

    Thanks

    • @1stClassMaths
      @1stClassMaths  Месяц назад +1

      Thank you so much really appreciate this. Thanks also to your son's teacher for the recommendation! Best of luck with the studies (well for your son at least!) 💙

  • @OptimesssPrime
    @OptimesssPrime 8 месяцев назад

    at 6:50 you say 4x^2 - 3x^2= 7x^2... is that correct?

    • @1stClassMaths
      @1stClassMaths  8 месяцев назад +1

      Hi. If you listen again I say 4x^2 - (-3x^2).
      This is 7x^2 since you are subtracting a negative.

    • @OptimesssPrime
      @OptimesssPrime 8 месяцев назад

      @@1stClassMaths thank you for the reply, I get it now.

  • @kebabz5856
    @kebabz5856 10 месяцев назад +1

    imo the grid method that tlmaths taught for factorising is way easier but still great vid as always

    • @1stClassMaths
      @1stClassMaths  10 месяцев назад

      Yes there are actually other ways that aren’t either of those as well. I use this as for me it is fastest.

    • @rakiri209
      @rakiri209 6 месяцев назад

      @@1stClassMaths If u have no factors at all is the only method to use trial and error to find one of the factors 1st

    • @1stClassMaths
      @1stClassMaths  6 месяцев назад

      @@rakiri209 Yes although you know the factors will be a factor of the constant term at the end. In this course though you will be given a factor.

    • @rakiri209
      @rakiri209 6 месяцев назад

      @@1stClassMaths
      Thanks
      Damn considering i replied on a comment from 3 months ago you responded pretty quickly😅

    • @1stClassMaths
      @1stClassMaths  6 месяцев назад

      RUclips shows me all new comments so I reply in RUclips studio rather than actually on the video. The newest ones are at the top :)

  • @yuutek4165
    @yuutek4165 5 месяцев назад

    When the coefficient of x in the factor is 2(or anything not 1), why do you make it equal to 0? Like when you have 2x+1 you figure out if 2x+1=0 then x=-1/2 and then you substitute the x into the equation instead of a… how does this work

    • @1stClassMaths
      @1stClassMaths  5 месяцев назад

      If we had (2x + 1)(x + 3)(x - 2) = 0 then what we really have is just three numbers multiplied together equalling zero.
      If you multiply three things together and you get 0 then at least one of them must be equal to zero so either
      2x + 1 = 0
      or
      x + 3 = 0
      or
      x - 2 = 0
      We then solve each of these to find the x values that make their brackets zero and in turn the overall thing zero.
      The second two solve easily by taking the opposite sign but the first one requires 2 step as you describe.

  • @BoscoPupaka
    @BoscoPupaka 3 месяца назад

    ❤❤ thanks man
    You just defeated my demon
    ❤❤❤❤

  • @ifragyt4155
    @ifragyt4155 3 месяца назад

    deserves lot more than 50k subs

  • @neosnoe
    @neosnoe 6 месяцев назад

    fm gcse in an hour thank you

  • @AditiGupta-k9f
    @AditiGupta-k9f 9 месяцев назад

    the video was so helpful! thank you!

  • @ronynkrumahzakaria5926
    @ronynkrumahzakaria5926 5 месяцев назад

    Great channel.

  • @lenagalyo7059
    @lenagalyo7059 6 месяцев назад

    legend

  • @BoscoPupaka
    @BoscoPupaka 3 месяца назад

    ❤❤ thanks man
    You just defeated my demon
    ❤❤❤❤

  • @dreamingaxolotl9477
    @dreamingaxolotl9477 3 месяца назад +1

    legend