(7m^2-4mn-n^2)-2(2m^2-mn+2n^2)计算.
计算(-mn)^2×(-m^2n)^3
计算(-2mn)^3(mn+1/2)(m^2n^2-1/2mn+1/4)
[(m+n)^2-4mn][(m-n)^2+4mn]+2(mn)^2
3(m^2n+mn)-4(mn-2m^2n)+mn.
计算(m-n)²/2mn-m²-n²/2mn的结果是
(7m²-4mn-n²)-(3m²-mn+2n²)求解
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=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)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
4-m²n²+2mn
若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)