3x²y-﹛x²z-[3x²y+﹙﹣xyz﹚-3x²z]﹜
已知方程组﹛x+4y-3z=0 4x-5y+2z=0 ,xyz≠0,求﹙3x²+2xy+z²﹚÷﹙x
x³+y³+z³-3xyz为什么等于(x+y+z)(x²+y²+z
1、x³+x²y-x²z-xyz
已知x-2y+z=0,3x+6y-z=0(xyz≠0),求2x²+y²/x²+y²
已知xyz都不为零,且方程组4x-3y-3z=0,x-3y+z=0求x:y:z
正整数x、y、z满足x&3-y&3-z&3=3xyz,x²=0(y+z),则xy+yz+xz=()
已知有理数x,y,z满足(x-z-2)²+(3x-6y-7)+|3y+3z-4|=0,则xyz=
已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
已知xyz≠0,且x+3y+z=0,2x+3y-z=0 ,求x+2y-7z /3x+5y+z的值?
已知XYZ满足/x-2-z/+(3x-6y-7)²+/3y+3z-4/=0.求XYZ的值
因式分解:25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y)