问题:
问题描述:
y(5x-5y)*(5x-5y)-(3y-3x)*(3y-3x)如何分解因式
屈颖歌回答:
y(5x-5y)*(5x-5y)-(3y-3x)*(3y-3x)
=25y(x-y)^2-9(y-x)^2
=25y(x-y)^2-9(x-y)^2
=(x-y)^2(25y-9)