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数学
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(m-n)(x-y)-(n-m)(x+y)因式分解
人气:465 ℃ 时间:2020-04-21 20:22:42
解答
(m-n)(X-Y)-(n-m)(X+Y) =(m-n)(X-Y)+(m-n)(X+Y)=(m-n)(X-Y+X+Y)=2X(M-n)
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