X(M-2)^2-5Y（N-2）^2=5则M的N次方等于多少?

2m+n 5 3 2m-n诺4x y 与x y 是同类项,m/n= 如果x^m-n×x^2n+1=x^11,y^m-1×y^4-n=y^5,求(-2)^m×(-1)^n的值 已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N 已知x^n=5,y^m=3,求（a^2*y）^2n 已知x^m+n=3,y^m-n=2,求代数式(-1/3x^2m+n·y^5m-6n)·(1/2x^m+2n·y^2n-m) 已知(m+n)x^n·y^m-2·(3xy^2+5x^2·y)=21x^m·y^n+1+35x^m+1·y^n,求m和n 已知-2x^m+4y^2-m与5x^n-1y^n+1的和是单项式,m=（）n=（） (1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2= 若3x^m+1y^2与x^3y^n的积是单项式3x^5y^5则n^m+m^n= 】已知:【M】=-5x^2+3xy-2y^2,【N】=5x^2-6xy+2y^2.求：M-N、M+N、N-(M-N)】已知:【M】=-5x^2+3xy-2y^2,【N】=5x^2-6xy+2y^2求：M-N、M+N、N-(M-N) (x+y)(m+n)2-(x+y)(m+n)2 x^n*y*(-x^2y^m) 已知单项式M N满足3x(M-5x)=6x^2y^2 求M N m(x-y)^n+n(y-x)^2n因式分解 2x^2m-n y^3m-2n 与5x^2n y^5是同类项,则m= ,n= （x-y）^7÷（y-x）^5 已知x^m-n÷x^2n-1=x^11,且 y^m-1÷y^4-n=y^9 ,求mn的值~~~ 若2x^m-n+1y^3m-2n-5与-3x^n-1y是同类项,则m=___,n=____RT 若4x^2m+n * y^m-n与-8x *y^5-n是同类项,则m=?,n=?