因式分解（2m-3n）^2-(2m+3n)(2m-3n)+(2m+3n)^2

分类: 作业答案 • 2023-01-17 17:25:18

问题描述：

答

（2m-3n）^2-(2m+3n)(2m-3n)+(2m+3n)^2
=（2m-3n）^2-2(2m+3n)(2m-3n)+(2m+3n)^2+(2m+3n)(2m-3n)
=（2m-3n-2m-3n）^2+(2m+3n)(2m-3n)
=36n^2+4m^2-9n^2
=27n^2+4m^2