已知实数x,y满足x2+4xy+4y2-x-2y+14=0,则x+2y的值为 ___ .
已知实数x,y满足x2+4xy+4y2-x-2y+14=0,则x+2y的值为 ___ .
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)+(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
已知实数x,y满足x2+y2-2x+4y=0,则x2+y2的最小值是
已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y的值
已知实数x,y满足x2+y2-xy+x-1/2y+1/4=0 试求x,y的值
已知正实数x,y满足x2+y2+xy=1,则x+y的最大值是___.
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2x2-7xy+3y2=0,求x:y
实数x、y满足x2+y2=4,则x+y-xy的最大值为______.
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______.