已知x+y+yz=5,y+z+xy=8,x+z+xy=9,求x,y,z
已知X+Y+Z=a,XY+YZ+XZ=b,求X*X+Y*Y+Z*Z的值
已知x+y+z=5,xy+yz+zx=9,求x^2+y^2+z^2的值
已知三个数x,y,z,满足xy/x+y=-2,yz/y+z=4/3,zx/z+x=-4/3,求(xyz)/(xy+yz+
已知x+y+z=10,xy+xz+yz=8,求x方+y方+z方的值
已知x+y+z=10,xy+xz+yz=8,求x²+y²+z²的值
已知x+y+z=2,xy+yz+zx=-5,求x²+y²+z²的值
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
时数x,y,z满足x+y+z=5,xy+yz+zx=3,求Z最大值
已知xy/x+y=3,yz/y+z=2,zx/z+x=1,求y的值
1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的
已知3x-4y-z=0,2x+y-8z=0,求xy+yz分之x二次方+y二次方-z二次方
已知3x-4y-z=0 2x+y-8z =0,求(x²+y²-z²)/(xy+yz)的值