2x^6n-x^4n×y^3m-y^9m,已知x^2n=3,y^3n=2,求值
2x^6n-x^4n×y^3m-y^9m,已知x^2n=3,y^3n=2,求值
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
已知函数f(x)=2/3x²-4x+9,求实数m,n,使x∈[m,n]时,y∈[m,n].
3x+4y=-5 5x+6y=-9 (n-8m)x-8y=10 5x+(10m+2n)y=-9 求m.m+n.n=?
已知-2x^m+2n+y^3m+4n=9是关于x,y的二元一次方程,求m+n.
已知单项式M N满足3x(M-5x)=6x^2y^2 求M N
已知集合M={(x,y)|y=x+3},N={(x,y)|y=-2x+6},则M∩N=______.
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
已知x^3m=8,y^3n=27,求(x^2m)^3+(y^n)^3-x^2m*y^n