正数xy满足x2-y2=2xy,求x+y分之x-y的值
正数xy满足x2-y2=2xy,求x+y分之x-y的值
1.已知正数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
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
已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
已知xy满足x2+y2-6x+2y+10=0,求立方根号x2-y2的值
已知2x=3y,求xy/(x2+y2)-y2/(x2-y2)的值
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x2+xy+y2=3,则x2-xy+y2的最小值
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值