Multiply the following binomials using the FOIL method:
(x – 2)(x + 4)
Algebra equation need help")?
2009-05-03 3:38 pm
回答 (8)
2009-05-03 4:04 pm
✔ 最佳答案
(x - 2)(x + 4)= x*x - 2*x + x*4 - 2*4
= x^2 - 2x + 4x - 8
= x^2 + 2x - 8
2009-05-03 10:58 pm
figure it out like this
x(x+4) -2(x+4)
it helps.. you should get
x^2+4x+-2x+-8
then
x^2+2x-8
theres the answer!
x(x+4) -2(x+4)
it helps.. you should get
x^2+4x+-2x+-8
then
x^2+2x-8
theres the answer!
2009-05-03 10:49 pm
x^2 + 2x -8
2009-05-03 10:48 pm
x 2 + 4x - 2x - 8
x2 +2x - 8
x2 +2x - 8
2009-05-03 10:46 pm
(x-2)(x+4)
x² - First
4x - outer
-2x - inner
-8 - last
Add them all together
x² + 4x - 2x - 8
Combine like terms
x² + 2x - 8
x² - First
4x - outer
-2x - inner
-8 - last
Add them all together
x² + 4x - 2x - 8
Combine like terms
x² + 2x - 8
2009-05-03 10:46 pm
Where is the equation?
2009-05-03 10:46 pm
I don't know this method.
(x-a)(x+b)= x^2- ax+bx-ab= x^2+(b-a)x+ab
so:
(x – 2)(x + 4)=x^2+2x-8
(x-a)(x+b)= x^2- ax+bx-ab= x^2+(b-a)x+ab
so:
(x – 2)(x + 4)=x^2+2x-8
2009-05-03 10:45 pm
x^2 + 2x - 8
收錄日期: 2021-05-01 12:20:52
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