(2m+n-p)(2m-n-p)等于什么

问题描述:

(2m+n-p)(2m-n-p)等于什么

(2m+n-p)(2m-n-p)
=[(2m-p)+n][(2m-p)-n]
=(2m-p)²-n²
=4m²-4mp+p²-n²
对我的回答有不明白的可以追问!