(m-n+p)(m+n-p)等于多少

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(m-n+p)(m+n-p)等于多少
(m-n+p)(m+n-p)等于多少

(m-n+p)(m+n-p)等于多少
(m-n+p)(m+n-p)
=[m-(n-p)][m+(n-p)]
=m²-(n-p)²
=m²-n²+2np-p²

(m-n+p)(m+n-p)=m²-n²-p²+2np

(m-n+p)(m+n-p)=[m-(n-p)][m+(n-p)]=m^2-(n-p)^2=m^2-n^2-p^2+2np

(m-n+p)(m+n-p)
=[m-(n-p)][m+(n-p)]
=m²-(n-p)²
=m²-n²+2np-p²

m²-n²+2np-p²