已知m^2=2n+5,n^2=2m+5,且m不等于n,求m^3-4mn+n^3的值

已知m^2=2n+5,n^2=2m+5,且m不等于n,求m^3-4mn+n^3的值 已知:m^2=5m+1,n^2=5n+1,且m不等于n,求(m^2+n^2)/mn的值 已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值 已知m和n是正整数,且m-n+mn=4,求2m+3n的值 若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值 已知m方=n+3,n方=m+3,且m不等于n.1)求m+n的值 (2)求m^3-2mn+n^3的值第二问求详解.谢 已知：m*m=n+2,n*n=m+2.求m*m*m-2mn+n*n*n（m不等于n）. 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值. 已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)的值 已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值 已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值