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数学
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因式分解(3m+2n)2-4(m-n)2
人气:255 ℃ 时间:2020-02-02 23:50:47
解答
(3m+2n)²-4(m-n)²
=(3m+2n)²-2²(m-n)²
=(3m+2n)²-(2m-2n)²
=(3m+2n+2m-2n)(3m+2n-2m+2n)
=5m(m+4n)
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