已知方程组x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x²+2xy+z²)÷(x&s
1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的
已知实数X,Y,Z满足 X²-6XY+10Y²+4Y+∣Z²-3Z+2∣+4=0,求(X+
已知x/3=y/4=z/6,(x,y,z≠0),求xy+yz+xz/x²+y²+z²
已知4x-3y-6z=0,x+2y-7z=0,xyz≠0,求2x²+3y²+6z²除以x&
已知4x-5y=2z=0,x+4y-3z=0.求x²+y²+z²÷xy+yz+xz的值.
已知一方程组:x-3y+7z=0与x-2y+4z=0(xyz≠0),求x:y:z.
已知x²+y²+z²-2x+4y-6z+14=0,求代数式(x-y-z)²&or
初一数学已知3x-4y-z=0,2x+y-8z=0,且x,y,z不全为0求x²+2xy+z²/xy+
已知2x+3y-5z=0,3x-2y+12z=0(z≠0),求4x²-12xy+9y²/2x&sup
已知方程组﹛x+4y-3z=0 4x-5y+2z=0 ,xyz≠0,求﹙3x²+2xy+z²﹚÷﹙x
1、 已知:2x-3y+z=0,3x-2y-6z=0,xyz≠0,求x²+y²+z²/2x
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少