(m+2n+47)(m+47)=mn

1/M+1/N=5(3M+MN+2N)/(M-MN=3N)1/M+1/N=5(3M+MN+2N)/(M-MN=3N)1/M+1/N=5(3M+MN+2N)/(M-MN=3N)M-MN=3N->M=3N

急2[mn+(-3m)]-3(2n-mn),m+n=2mn=-3急2[mn+(-3m)]-3(2n-mn),m+n=2mn=-3急2[mn+(-3m)]-3(2n-mn),m+n=2mn=-32[mn

若(m+n)^2-mn(m+n)=(m+n)·M,则M是（）A.m^2+n^2B.m^2-mn+n^2C.m^2-3mn+n^2D.m^2+mn+n^2若(m+n)^2-mn(m+n)=(m+n)·M

M-n=2m+n=5Mn?M-n=2m+n=5Mn?M-n=2m+n=5Mn?m=二分之七,n=二分之三

已知m-n=4,m、n互为倒数求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4m+mn)的值已知m-n=4,m、n互为倒数求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4m+m

已知mn-n=15,m-mn=6,则m-n=_,-2mn+m+n=_已知mn-n=15,m-mn=6,则m-n=_,-2mn+m+n=_已知mn-n=15,m-mn=6,则m-n=_,-2mn+m+n

已知mn-m=15,n-mn=6则n-m=(),-2mn+m+n=()已知mn-m=15,n-mn=6则n-m=(),-2mn+m+n=()已知mn-m=15,n-mn=6则n-m=(),-2mn+m

mn-n=15;m-mn=6那么m-n=();-2mn+m+n=()mn-n=15;m-mn=6那么m-n=();-2mn+m+n=()mn-n=15;m-mn=6那么m-n=();-2mn+m+n=

已知mn-n=20,m-mn=16,则m-n=?,-2mn+m+n=?已知mn-n=20,m-mn=16,则m-n=?,-2mn+m+n=?已知mn-n=20,m-mn=16,则m-n=?,-2mn+

已知m-mn=21,mn-n=15,求m-n与m-2mn+n的值.已知m-mn=21,mn-n=15,求m-n与m-2mn+n的值.已知m-mn=21,mn-n=15,求m-n与m-2mn+n的值.因

已知mn/m+n=2求3m-5mn+3n/-m+3mn-n已知mn/m+n=2求3m-5mn+3n/-m+3mn-n已知mn/m+n=2求3m-5mn+3n/-m+3mn-n由于:mn/(m+n)=2

已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n答：mn

已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n3m-5

已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值由于:m

已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+

已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+

m(m+n)(m-n)-m(m+n)的平方,其中m+n=1,mn=-1/2m(m+n)(m-n)-m(m+n)的平方,其中m+n=1,mn=-1/2m(m+n)(m-n)-m(m+n)的平方,其中m+

若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是（

mn=1m+n=2mn=1m+n=2mn=1m+n=2m=1n=1

m+n=-1mn=-2m+n=-1mn=-2m+n=-1mn=-2