若m-n=5,m^2+n^2=27,则m*n的值是多少?
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若(m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是
若m^2+n^2+2m-4n+5=0,则m+n=?
若m、n互为相反数,则(5m-3n)-(2m-6n)=
(m-2n/n-m)-(n/m-n)=
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
m/n=5/3,求(m/m+n)+(m/m+n)-(n^2/m^2-n^2)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
已知|m|=5,|n|=2 |m+n|=m+n,求m-n
已知m+n=2012(m-n),则m+n/2(m-n)=?
若|m|=4,|n|=1/2 1,若m+n>m-n,则m+n=?2,若|m+n|=|m|+|n|若|m|=4,|n|=1/21,若m+n>m-n,则m+n=?2,若|m+n|=|m|+|n|,则m、n的值分别是:
若m-n=5,m^2+n^2=27,则m*n的值是多少?
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
.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
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