Question

（aˆ4-2aˆ2*bˆ2+bˆ4）÷（a+b）ˆ2÷(a-b)O(∩

Answer 1

(a^4-2a^2b^2+b^4)/(a+b)^2/(a-b)

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

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

=a-