Question

Cubed Roots HELP!

I need to simplify 7x^3 - 56

7x^3 - 56
7(x^3 - 56)

Now what? I know the answer, it is 7(x-2)(x + 2x + 4) but can someone please explain to me how they got there?

Answer 1

I apologize it is 7(x^3 - 8)

Answer 2

You need to factor \(7(x^3 - 8)\) ?

Answer 3

The factorization of \(a^3 - b^3\) is as follows:

\(a^3 - b^3 = (a - b)(a^2 + ab + b^2) \)

This is known as a difference of cubes.

Answer 4

THANK YOU SO MUCH! That was the formula I couldnt remember!

Answer 5

You're welcome.