(1-x²)(1-y²)-4xy 因式分解

分类: 作业答案 • 2022-05-29 20:27:15

问题描述：

(1-x²)(1-y²)-4xy 因式分解
(1-x²)(1-y²)-4xy
（2x²-3x+1）²-22x+33x-1

答

(1-x²)(1-y²)-4xy=1-x²-y²+x²y²-2xy-2xy=1-2xy+x²y²-x²-y²-2xy=(1-xy)²-(x+y)²=(1-xy+x+y)(1-xy-x-y)(2x²-3x+1)²-22x+33x-1题目有误第二道没错