3y(x-1)^2-4x(1-x)^2
问题描述:
3y(x-1)^2-4x(1-x)^2
答
3y(x-1)^2-4x(1-x)^2
=3y(x-1)^2-4x(x-1)^2
=(x-1)^2(3y-4x)