Question

a/(a-b)^2乘(a-b)(a^2+ab+b^2)/a^2+ab+b^2+[(2a+2)/(a-b)-2] 化简为多

Answer 1

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

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

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

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