已知x+4y-3z=0 4x-5y+2z=0,xyz≠0,求3x²+2xy+z²/x²+y
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知方程组﹛x+4y-3z=0 4x-5y+2z=0 ,xyz≠0,求﹙3x²+2xy+z²﹚÷﹙x
已知X+4Y-3Z=0,4X-5Y+2Z=0(XYZ≠0),求(3x²+2xy+z²)/(x
已知4x-5y+2z=0,x+4y-3z=0,求(x²+y²+z²)/xy+yz+xz
已知实数x,y,z满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y
已知x-2y+z=0,3x+6y-z=0(xyz≠0),求2x²+y²/x²+y²
(x-3y+z)^2+/ 5x-4y+z/=0 且xyz≠0 xy+yz+zx/x^2+y^2+z^2
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
已知x+3y-5z=0,x-3y+4z=0,且xyz≠0,求x²+y²+z²÷xy+yz+
已知x+4y-3z=04x-5y+2z=0,xyz≠0,求3x2+2xy+z2x2+y2的值.
已知4x-3y-3z=0,x-3y-z=0 求xy+2yz/x²+y²+z²