若(3/4 x^3-m y^n)/(-x^n-5 y ^2)^2=3/4x^2y,则2m+2

若x^3y^m-1*x^m+n*y^2n+2=x^9y^9,则4m-3n=（）. 若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m,n的值 4x^(m+6)y^2+X^3y^n=单项式,m^n= 因式分解：3m[(2x+n)(2x-n)+y(y-4x)] 若x^3m=4,y^3n=5,求(x^2m)^3+(y^n)^3-x^2n*y^n*x^4m*y^2n的值 若x^3m=4,y^3n=5,求(x^2m)^3+(y^n)^3-x^2n*y^n*x^4m*y^2n的值 若x^3m=4,y^3n=5,求（x^2m)^3+(y^n)^3—x^2m·y^n·x^4m·y^2n的值 若x^3m=4,y^3n=5,求（x^2m)^3+(y^3n)^2 若x^3m=4,y^3n=5,求(x^2m)^3+(y^n)^3-^2m*y^n的值 计算：1.[(m+n)(n-m)-(m+n)^2+3m(m+n)]除以（-2M),其中m=-4,n=2 2.(x+y)(-x+y)-(x-y)^2-(X^2y-xy^2)除 2m+n 5 3 2m-n诺4x y 与x y 是同类项,m/n= 若椭圆x*x/m*m+y*y/n*n=1(m,n>0)过点(3,1),求m*m+n*n的最小值 分解因式：(x+y)(x-y)-(x+y)² 3m(m-n)+6n(n-m) x(x-y)-y(y-x) (x-3)²+（3x-9)(x+y)(x-y)-(x+y)² 3m(m-n)+6n(n-m) x(x-y)-y(y-x) (x-3)²+（3x-9) 把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x+y)^2-2(y+x)^2 若x^3m=4 y^3m=5 求(x^2m)^3+(y^n)^3-x^3my^3n的值 若(3/4 x^3-m y^n)/(-x^n-5 y ^2)^2=3/4x^2y,则2m+2 若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a 若多项式3x (m+2n) y和-4x(3) y(3m-2n)是同类项,则m= .n= .(___)中是次方