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数学
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(3m+2n)²-4(m-n)²
人气:237 ℃ 时间:2019-10-11 08:08:32
解答
(3m+2n)²-4(m-n)²
=(3m+2n-2m+2n)(3m+2n+2m-2n)
=5m(m+4n)
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因式分解(3m+2n)²-4(m-n)²
m²-3m=4,m=?
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