3y(x-1)^2-4x(1-x)^2

问题描述:

3y(x-1)^2-4x(1-x)^2

3y(x-1)^2-4x(1-x)^2
=3y(x-1)^2-4x(x-1)^2
=(x-1)^2(3y-4x)