已知m+n=3,求2m²+4mn+2n²-6的值
已知m+n+=3,mn=三分之二,求m²+(n-m)²+2m(n-mn)的值
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
已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值
已知m分之一-n分之一=4,求2m-3mn-2n/m-2mn-n的值
已知m+n=3,求2m²+4mn+2n²-6的值
已知mn/m+n=2,求3m-5mn+3n/-m+3mn-n的值
已知|m-n-2|与(mn-1)^互为相反数,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知(m-1)^2+|3m-2n|=0,求(4m^2-mn+6n^2)-2(m^2-3mn+5n^2)的值