若实数x,y满足x2-2xy+y2+x-y-6=0,则x-y的值是( )
若实数x,y满足x2-2xy+y2+x-y-6=0,则x-y的值是( )
已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值
已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值
若实数x,y满足x2+y2+xy=1,则x+y的最大值是 ( )
设实数xy满足x2 +2y2=6,则x+y的取值范围
已知实数x、y满足x2+4xy+4y2+x+2y-6=0,则x+2y的值为______.
已知实数x,y满足x2+xy+y2=3,则x2-xy+y2的最小值
设实数x,y满足x2+y2=1则 xy的取值范围是?
已知x、y是实数且满足x2+xy+y2-2=0,设M=x2-xy+y2,则M的取值范围是______.
已知实数x,y满足x2+y2-2x+4y=0,则x2+y2的最小值是
若实数XY满足X2+Y2=1,则X-2Y的最大值为
已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y的值