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=4及xy=z2+4,求x+2y+3z的值.
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=6-y,z^2-4z+4=xy-9,求x,y,z的值.
已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值
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满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y
已知实数x,y,z满足xy/x+y=2,xz/x+z=3,yz/y+z=4 求7x+5y-2z的值
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=6-y,z2=xy-9,求证:x=y.
已知实数x,y,z满足x+3y=6,2xy-z^2=6,求x、y、z的值