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因式分解(m-2n)²+(n+2m)²
人气:332 ℃ 时间:2019-12-06 19:57:09
解答
(m-2n)²+(n+2m)²
=m²-4mn+4n²+n²+4mn+4m²
=5m²+5n²
=5(m²+n²)
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