anonymous
  • anonymous
Did i do this right? here is my problem (x – 2) (3x-4) Remove the parenthesis x times 3=3x^2. x times -4 = -4x -2* 3x^2 = -6x^2 -2* -4x= 8x Now we have -6x^2 -8x Not sure if i combine or Divide... Guessing i'll combine. -6x^2 +-8x = 14^3 <-- my answer.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Vocaloid
  • Vocaloid
not quite, let's take it from the top (x-2)(3x-4) let's multiply the first terms x*3x = 3x^2 then the outer terms x*(-4) = -4x then the inner terms (-2)*(3x) = -6x then the last (-2)*(-4) = 8 now we combine: 3x^2 - 4x - 6x + 8 = 3x^2 - 10x + 8
Vocaloid
  • Vocaloid
let me know if there's anything you're still confused about
jdoe0001
  • jdoe0001
\(\large (x - 2) (3x-4)\implies \begin{array}{crllll} x\cdot 3x\implies &3x^2\\ x\cdot -4\implies &-4x\\ -2\cdot 3x\implies &-6x\\ -2\cdot -4\implies &+8 \end{array}\)

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anonymous
  • anonymous
Where did the 3x^2 come from didn't we just use that to make 6x? @Vocaloid
Vocaloid
  • Vocaloid
you need to use the (3x) twice
Vocaloid
  • Vocaloid
(A-B)(C-D) = A*C-A*D-B*C+B*D
anonymous
  • anonymous
Wow didn't know that one.
Vocaloid
  • Vocaloid
maybe I can draw this one out? |dw:1437691175227:dw|
Vocaloid
  • Vocaloid
|dw:1437691198444:dw|
Vocaloid
  • Vocaloid
|dw:1437691238225:dw|
Vocaloid
  • Vocaloid
|dw:1437691266501:dw|
Vocaloid
  • Vocaloid
|dw:1437691303670:dw|
Vocaloid
  • Vocaloid
adding everything together: 3x^2-4x-6x+8 = 3x^2-10x+8
anonymous
  • anonymous
Alright thanks a lot for explaining.

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