已知m-n=3,mn=1,求多项式.(﹣2mn+2m+3n)-(3mn+2n-2m)-(m+4n+m
若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
已知 m-n=4,mn=-1 .求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
分解因式:-4m^2n^3+12m^3n^2-2mn
[(m+n)^2-4mn][(m-n)^2+4mn]+2(mn)^2.
若(2m-n)²=3mn,求代数式n/m+4m/n-1的值
设m>n>0,m的平方+n的平方=4mn 则mn分之m的平方-n的平方等于多少
3(m^2n+mn)-4(mn-2m^2n)+mn.
若m-n=4,mn=-1,求代数式(9-2mn+2m+3n)-(m+4n+mn)的值
求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn) 先化简,再求值
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
3m-4(2mn-2n+4m)-2(7n+5m)化简,