aa－bb－xx+yy－2ay+2bx因式分解

分类: 作业答案 • 2022-06-25 13:47:48

问题描述：

答

aa－bb－xx+yy－2ay+2bx
=(a^2-2ay+y^2)-(x^2-2bx+b^2)
=(a-y)^2-(x-b)^2
=[(a-y)+(x-b)][(a-y)-(x-b)]
=(a+x-b-y)(a-x-y+b)