x^2y^2+1-x^2-y^ 因式分解

分类: 作业答案 • 2022-01-04 12:43:47

问题描述：

答

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