已知x^m+n×x^m-n=x^9,求m的值.

已知x^m+n×x^m-n=x^9,求m的值. 已知x的平方-6x+m=(x-2)(x-n),求吗,m,n 已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值 已知x^m+n=9,y^m+n=16,求（-三分之一*x^m*y^n)^2*x^2n*y^2n的值? 已知x^m+n=9,y^m+n=16,求（-三分之一*x^m*y^n)^2*x^2n*y^2n的值? 已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值；（2）求x^3m-2n的值 已知x^m=1/3,x^n=2,求x^2m+3n 已知x^m=3,x^n=6,求x^(3m－2n) 已知x^(m+n) =57,x^m =19,求x^3n的值 已知x^(m+n) =57,x^m =19,求x^3n的值 已知4x+1=m(x-2)+n(x-5),求m,n的值 已已知(x+m)²=x²-6x-n,求m+n的值 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知x^m=9,x^n=6,x^k=4,求x^m-2n+2k 已知单项式M、N满足2x(M+3x)=6x^2y^2+N,求M、N. 已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N 已知,单项式M,N满足2x（M+3x)=6x²y²+N,求M,N