Question

x-y/2x+2y与xy/(x+y)²;最简公分母是什么?怎样通分?

Answer 1

（x-y)/(2x+2y)

=(x-y)/2(x+y)

=(x-y)(x+y)/2(x+y)^2

xy/(x+y)^2

=2xy/2(x+y)^2

x - y/2x + 2y

=(x^2-y+4xy)/2x

=(x^2-y+4xy)(x+y)^2/2x(x+y)^2

xy/(x+y)^2

=2x^2y/2x(x+y)^2

不知你的分式是哪种情况.