[5m(3m-n)+2n(n-3m)]/(3m-n)

分类: 作业答案 • 2022-01-09 18:05:03

问题描述：

答

[5m(3m-n)+2n(n-3m)]/(3m-n)
=[5m(3m-n)-2n(3m-n)]/(3m-n)
=(5m-2n)(3m-n)/(3m-n)
=5m-2n