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数学
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2m-3n-m+2n
人气:295 ℃ 时间:2020-04-12 01:28:43
解答
=2m-m+2n-3n=m-n
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计算:(2m+3n)(m-2n)=_____________________
(-2m^2n^2)/(m^3n^2)
[2m的平方-(m+n)(m-n)][(-m-2n)(2n-m)+3n的平方]
已知m-3n=2m-2n-15=3,则m=( ),n=( )
[(m+3n)(m-3n)+(2n-m^2)+5n^2(1-m)-(2m^2-m^2n)÷(-1/2mn),其中m=3,n=201
知丑的不知足,
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