(2m+n-p)(2m-n-p)等于什么

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(2m+n-p)(2m-n-p)等于什么
(2m+n-p)(2m-n-p)等于什么

(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!

(2m+n-p)(2m-n-p)
=(2m-p+n)(2m-p-n)
=(2m-p)²-n²
=4m²-4mp+p²-n²

4m×m-4mp+n×n-p×p

=(2m-P)^2-n^2