初一数学填空3个-10m^2n+5m^4n-15m^3n^2=若x^2+mx-4=(x-4)(x+1)则m=2x+y=3
初一数学填空3个-10m^2n+5m^4n-15m^3n^2=若x^2+mx-4=(x-4)(x+1)则m=2x+y=3
(x+3)(x-4)=X^2-mx+n,则m^3n=
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)(
集合M={X=3m+1,m∈N*},N={y/y=5n+2,n∈N*},则M∩N=?
已知2x^5m+2n-18-y^3m-4n=1是关于x,y的二元一次方程,则m= ,n= .
已知M= {1,2,3,4 },N= {2,3,5,7 }.定义M-N= {x|x∈M,且x∉N },则M-
若x^2+9x+m=(x+3)(x+6),则m= x^2+mx+n=(x-1)(x+2),则m=,n= x^2-mx-n
若3x^m+1y^2与x^3y^n的积是单项式3x^5y^5则n^m+m^n=
若x^3m=4,y^3n=5,求(x^2m)^3+(y^n)^3—x^2m·y^n·x^4m·y^2n的值
3x+4y=-5 5x+6y=-9 (n-8m)x-8y=10 5x+(10m+2n)y=-9 求m.m+n.n=?
已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N
若x^3m=4,y^3n=5,求(x^2m)^3+(y^3n)^2