Question

化简:(a-b)(a+b)^2-(a+b)(a-b)^2+2b(a^2+b^2)要过程

Answer 1

:(a-b)(a+b)^2-(a+b)(a-b)^2+2b(a^2+b^2)

=(a-b)(a+b)(a+b-a+b)+2b(a²+b²)

=2b(a²-b²)+2b(a²+ b²)

=2b(a²-b²+a²+b²)

=4a²