Question

（a-b分之a+b）的二次方乘以3a+3b分之2a-2b减去a的二次方-b的二次方分之a的二次方除以b分之a等于多少啊

Answer 1

[(a+b)/(a-b)]^2[(2a-2b)/(3a+3b)]-[a^2/(a^2-b^2)]/(a/b)

=2(a-b)(a+b)^2/[3(a+b)(a-b)^2]-a^2b/[a(a^2-b^2)]

=2(a+b)^2/[3(a+b)(a-b)]-3ab/[3(a+b)(a-b)]

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

=(2a^2-ab+2b^2)/[3(a+b)(a-b)]