Question

expand 2x(x-8)^2

Answer 1

\[\huge 2x(x-8)(x-8)\]

Answer 2

multiply (x-8)(x-8)
first
then multiply the product by 2x

Answer 3

What would I do in this instance then? (x+2)(x+7)(x-2)

Answer 4

well it's the same thing you don't have to do in any specific order, you can multiply and add in any order and you'll get the same result

Answer 5

Here's what I got... I don't think it's right at all.
\[x ^{3}+7x ^{2}-10x-42\]

Answer 6

is that right?

Answer 7

(x+2)(x+7)(x-2) = (x + 2)(x - 2)(x + 7)
= x^2 - 4(x + 7)
= x^2(x + 7) - 4(x + 7)
= x^3 + 7x^2 - 4x - 28

Answer 8

oh ok!
Thank you very much!

Answer 9

Keep in mind difference of squares

\((a + b)(a - b) = a^2 - b^2\)


And distributive property:
\(a(b + c) = ab + ac\)