已知实数x,y满足x2-2xy+4y2-x-2y+1≤0,求x和y的值

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-xy+x-1/2y+1/4=0 试求x,y的值 已知实数x、y满足2x2-7xy+3y2=0,求x：y 已知实数x,y满足方程组x+xy+y=2+3根号2和x2+y2=6.求|x+y+1|的值. 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+y2-4x+1=0,求2x+y的取值范围? 已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值 已知实数x,y满足1≤x2+y2≤4,求f(x,y)=x2+xy+y2的最大值和最小值 已知实数x,y满足x2+y2+4x+3=0,求(y-2)/(x-1)的值域. 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______．