问题标题:
(m-n+p)(m+n-p)等于多少
问题描述:
(m-n+p)(m+n-p)等于多少
刘利群回答:
(m-n+p)(m+n-p)
=[m-(n-p)][m+(n-p)]
=m²-(n-p)²
=m²-n²+2np-p²
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