1.8m^2-9[4mn+m^2-3(2m^2+mn)]+(-10m^2-2mn)=?2.1/4a^2b^2[3ab(a
若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
3(m^2+mn)-4(mn-2m^2n)+mn
3(m^2n+mn)-4(mn-2m^2n)+mn.
(a^m)^n*(-a^3m)2n/(a^mn)^5-a^2mn
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=2,mn=1,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
若m-n=4,mn=-1,求(-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
若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值
急2[mn+(-3m)]-3(2n-mn),m+n=2 mn=-3
-2(mn-3m平方)-{m平方-5(mn-m平方)+2mn,其中m=1,n=-2