若x-3=y-2=z-1,求x^+y^+z^-xy-yz-xz的值,
x-3=y-2=z-1,求x^2+y^2+z^2-xy-yz-xz的值
若x/2=1/y=z/3,且xy+xz+yz=99,求4x^2-2xz+3yz-9y^2的值.
若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值
已知1=xy/x+y,2=yz/y+z,3=xz/x+z,求x+y+z的值
已知xy分之x+y=3,yz分之y+z=2,xz分之x+z=1,求x,y,z的值
已知x+y+z=1,xy+yz+xz=0,求x^2+y^2+z^2的值.
已知x+y+z=1,x²+y²+z²=2求xy+yz+xz的值
如果1=xy/x+y,2=yz/y+z,3=xz/x+z,则x的值?
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
已知X+Y+Z=a,XY+YZ+XZ=b,求X*X+Y*Y+Z*Z的值
若X/3=Y/1=Z/4,且XY+XZ+YZ=76,求2X^2+12Y^2+9Z^2的值
若实数x,y,z满足:xy=1,yz=2,xz=3,求x,y,z的值