如果实数x,y满足2x^2-6xy+9y^2-4x+4=0,那么根号y=

已知实数xy满足x+2y 已知实数xy满足 x+y-2 如果实数xy满足x+2y>0 x-2y 如果实数x y满足x+y>=-2,x+y+xy>=-1 则y的最小值 若正实数x ,y满足2x+y+6＝xy.则xy的最小值. 若正实数x,y满足2x+y+6=xy,求xy的最小值. 若正实数X,Y满足2X+Y+6=XY,求XY的最小值. 如果实数x,y满足2x^2-6xy+9y^2-4x+4=0,那么根号y= 已知实数x,y,z满足x=6-y,z^2=xy-9,求证：x=y 已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z 如果实数x,y满足x^2+y^2=1,则(1+xy)(1-xy)有高一必修1内容 如果实数x、y满足2x²-6xy+9y²-4x+4=o,那么yx= 当实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x平方y+xy平方=多少 已知实数x满足x^2+2xy+y^2-(x+y)-6=0则x+y的值 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若正实数x.y满足x+y=xy,则x+2y的最小值 已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y 若实数xy满足x^2+y^2-2x+6y=0 则x-2y的最大值