Question

a3+a2b-ab2-b3,a的三次方加a的二次方b减ab的二次方减b的三次方

Answer 1

a^3+a^2b-ab^2-b^3

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

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

=(a+b)(a+b)(a-b)