约分.x-2x^2y/x^2y-2xy^2

问题描述:

约分.x-2x^2y/x^2y-2xy^2

(1-2xy)/y(x-2y)

x-2x^2y/x^2y-2xy^2
=x(1-2xy)/[xy(x-2y)]
=(1-2xy)/[y(x-2y)]