(x-y)(x-y-3)-10 因式分解怎么写

题目

(x-y)(x-y-3)-10 因式分解怎么写

答案

解
原式
=(x-y)^2-3(x-y)-10
=[(x-y)-5][(x-y)+2]
=*(x-y-5)(x-y+2)