5x的平方-10xy+5y的平方-2x+2y答案
问题描述：
5x的平方-10xy+5y的平方-2x+2y答案
答
(x-y)(5x-5y-2)
答
(√5x-√5y)²-2(x-y)
答
5x^2-10xy+5y^2-2x+2y
=5(x-y)^2-2(x-y)
=(x-y)(5x-5y-2)