Question

When multiplying and simplifying
(a-b) (a+b) (a+b)^2
it equals
2a^2+2B^2
right?

Answer 1

(a-b)(a+b) = a^2 - b^2
(a^2-b^2)(a^2+2ab+b^2) = a^4+2a^3b - 2ab^3-b^4