问题标题:
【(m-2n+p)的2次方等于多少?】
问题描述:
(m-2n+p)的2次方等于多少?
罗沄回答:
(m-2n+p)²
=[(m-2n)+p]²
=(m-2n)²+2×p×(m-2n)+p²
=m²-4mn+4n²+2pm-4pn+p²
=m²+4n²+p²-4mn-4pn+2pm
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(m-2n+p)的2次方等于多少?