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数学
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(m-n)^3+(2m+3n)^3的因式分解
人气:202 ℃ 时间:2019-12-25 12:05:58
解答
(m-n)^3+(2m+3n)^3
=(m-n+2m+3n)(m^2+n^2-2mn+4m^2+9n^2+12mn-2m^2-mn+3n^2)
=(3m+2n)(3m^2+9mn+13n^2)
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