若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a

若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m, 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 若ax^3my^12=3x^3y^2n*4x^6y^8,求(m+2n-a)^2 若ax的3m次方y^12/3x^3y^2n=4x^6y^8,求（2m+n-a）^-n的值 1.若3x-2y-4=0求1000的x次方*100的y次方 2.若a^m=2,a^n=6求:a^m-n,a^2n-3m 3x+4y=-5 5x+6y=-9 (n-8m)x-8y=10 5x+(10m+2n)y=-9 求m.m+n.n=? 4（x-y）三次方-2y（y-x）平方 3m（m-n）平方-6n（n-m） 8a（x-y）三次方-b（y-x）平方 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 若x^3m=4,y^3n=5,求（x^2m)^3+(y^3n)^2