(2m+n-p)(2m-n-p)等于什么
问题描述：
(2m+n-p)(2m-n-p)等于什么
答
=（2m-P）^2-n^2
答
4m×m-4mp+n×n-p×p
答
(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!
答
(2m+n-p)(2m-n-p)
=(2m-p+n)(2m-p-n)
=（2m-p）²-n²
=4m²-4mp＋p²-n²