若(x+3)2+(2y-6)2=0,则x2+y2的值为?
若实数x,y满足3x2+2y2=6x,则x2+y2的最大值为______.
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
实数x、y满足3x2+2y2=6x,则x2+y2的最大值为( )
已知2x=3y,求xy/(x2+y2)-y2/(x2-y2)的值
已知x,y为实数,且(x2 +y2)(x2 +y2+2)=3.求x2 +y2的值
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
若实数x,y满足X2+y2-2X+4y=0,则x-2y的最大值为?
已知实数x、y满足(x2+y2)(x2+y2-1)=2,则x2+y2的值为______.
若x2-2x+y2+6y+10=0,求x,y的值
若|x+y-5|+(xy-6)2=0,则x2+y2的值为______.
若|x+y-5|+(xy-3)2=0,则x2+y2的值为( )
已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值