已知实数z、y、z满足x+y=5及z2=xy+y-9,则x+2y+3z=______.
已知实数z、y、z满足x+y=5及z2=xy+y-9,则x+2y+3z=______.
已知实数x.y.z满足x+y=5及z的2次方=xy+y-9则x+2y+3z=?
已知实数x、y、z满足x+y=4及xy=z2+4,求x+2y+3z的值.
已知实数x,y,z满足x-y=8,xy+z2=-16,则x+y+z=______.
已知实数x,y,z满足x=6-y,z2=xy-9,求证:x=y.
已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/(
已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z
已知实数x,y,z,满足x+y=5,z²=xy+y=9,求x+2y+3Z的值
已知实数x,y,z满足x-y=5,z^2=-xy-y-9,求x-2y+3z的值
已知实数x,y,z适合x+y=6,z2=xy-9,则z=( )
若实数x,y,z满足x+2y+3z=a(a为常数),则x2+y2+z2的最小值为______.
已知x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求代数式x2/(y+z)+y2/(x+z)+z2/