Question

How do you factor `2a^3-128`?

Answer 1

`(a - 4)(a^2 + 4a + 16)`

Explanation:

Apply the algebraic formula:
`a^3 - b^3 = (a - b) (a^2 + ab + b^2)`
`y = 2(a^3 - 64) = 2(a^3 - 4^3) = 2(a - 4)(a^2 + 4a + 16)`