因式分解x^2-y^2-x-y

分类: 作业答案 • 2021-12-28 11:17:34

问题描述：

因式分解x^2-y^2-x-y

答

x^2-y^2-x-y
=(x^2-y^2)-(x+y)
=(x-y)(x+y)-(x+y)
=(x+y)(x-y-1)