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数学
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(3m+2n)²-(2m+3n)
人气:273 ℃ 时间:2019-09-24 19:30:21
解答
(3m+2n)²-(2m+3n)² 帮你加一个平方
=(3m+2n+2m+3n)(3m+2n-2m-3n)
=(5m+5n)(m-n)
=5(m+n)(m-n)你咋知道我掉了一个平方?
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4(3m+2n)²-9(2m+3n)²分解因式
2m+3n=3m-2n=3
已知4m+n=90,2m-3n=10,求(m+2n)2-(3m-n)2的值.
已知4M+N=9,2M-3N=1,求(M+2N)²-(3M-N)²的值
(3m+2n)^2-(2m+3n)^2
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