若m/n=2,则m+3n/m-n=谁会麻烦算一下
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若m/n=2,则m+3n/m-n=谁会麻烦算一下
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
m/n=7/3则m+n/m-n
(m-n)^3(n-m)^2(m-n)=_____
1若m=n,则|m|=|n|;2若m=—n,则|m|=|n|;3若|m|=|n|,则m=—n;4若|m|=|n|,则m=n哪个对
若(m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n)/[4(2m+n)]}的值是?
(3m-n)(m-2n)=()
若(m+n)^2-mn(m+n)=(m+n)·M,则M是() A.m^2+n^2 B.m^2-mn+n^2 C.m^2-3mn+n^2 D.m^2+mn+n^2
(m-2n/n-m)-(n/m-n)=
m-[n-3m-(m-n)]=?
若|m-n|=n-m,且|m|=4、|n|=3,则(m+n)^2=
若|m-n|=n-m,且|m|=4,|n|=3,则(m+n)^2=?
若有理数m,n满足m-2n=4,2m-n=3,则m+n等于
若m^2-n^2=6,且m-n=3,则m+n=?
若m+n=0,则多项式m^3-m^3n-mn^2+n^3
若m n互为相反数 则3[m-n]-1/2[2m-10n]=?