已知x.y满足X2-y2=2xy.则x-y/x+y=?x.
已知实数x,y满足x2+xy+y2=3,则x2-xy+y2的最小值
已知实数x、y满足2x2-7xy+3y2=0,求x:y
正整数x,y满足x2-y2=2xy,求x-y/x+y的值
整数x,y满足x2-y2=2xy,求x-y/x+y的值
已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值
1.已知正数x,y满足x2-y2=2xy,求(x-y)/(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=0则x+y得最小值
正数xy满足x2-y2=2xy,求x+y分之x-y的值
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______.
已知正实数x,y满足x2+y2+xy=1,则x+y的最大值是___.