4x方y/(x-2y)(x+2y)怎么算

分类: 作业答案 • 2022-03-23 17:04:24

问题描述：

4x方y/(x-2y)(x+2y)怎么算
[x方/x-2y]-4x方y/(x-2y)(x+2y)=?

答

x^2/(x-2y) -4x^2y/(x-2y)(x+2y)
=[x^2(x+2y)-4x^2y]/(x-2y)(x+2y)
=x^2(x+2y-4y)/(x-2y)(x+2y)
=x^2(x-2y)/(x-2y)(x+2y)
=x^2/(x+2y)