(m+2n)^2-(2m-n)^2

分类: 作业答案 • 2021-12-28 14:25:24

问题描述：

(m+2n)^2-(2m-n)^2
因式分解

答

(m+2n)^2-(2m-n)^2
=(m+2n+2m-n)(m+2n-2m+n)
=(3m+n)(3n-m)