6m^2n-3m^2n^2-15mn^3
已知m²-mn=15,mn-n²=-6,求代数式3m²-mn-2n²
已知n^2-mn=15,mn-n^2=-6,求3*m^2-mn-n^2的值
-3m^2n/5+m^2n-mn^2
已知m0,化简|5+3m|-|mn-6n|-|5mn-1|-|2m-3n|
已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值
(m^2-n^2/mn)^2÷(m+n)^2*(m/m-n)^3 化简
急2[mn+(-3m)]-3(2n-mn),m+n=2 mn=-3
3(m^2n+mn)-4(mn-2m^2n)+mn.
6m^2n-3m^2n^2-15mn^3
已知mn/m+n=2,求3m-5mn+3n/-m+3mn-n的值
已知mn/m+n=2,求3m-5mn+3n/(-m)+3mn-n
已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n