若x、y满足x2+2y2-2xy-2y+1=0,求xy的值.

已知x.y满足X2-y2=2xy.则x-y/x+y=?x. 整数x,y满足x2-y2=2xy,求x-y/x+y的值 正整数x,y满足x2-y2=2xy,求x-y/x+y的值 若x,y,z满足x2+2y2+z2≤2xy-2y+4Z,求x,y,z 若x、y满足x2+2y2-2xy-2y+1=0,求xy的值. 若x、y满足x2+2y2-2xy-2y+1=0,求xy的值. 若实数XY满足X2+Y2=1,则X-2Y的最大值为 x,y满足x2+2xy+3y2=2,x+2y的范围 已知实数x、y满足2x2-7xy+3y2=0,求x：y 若实数x,y满足x2+y2+x2y2-4xy+1=0,则(x+y)2的值为 计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/（x2+2xy-3y2） 已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值 4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy 已知xy满足x2+y2-6x+2y+10=0,求立方根号x2-y2的值 正数xy满足x2-y2=2xy,求x+y分之x-y的值2是平方, 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+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