正整数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
整数x,y满足x2-y2=2xy,求x-y/x+y的值
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)+(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
满足方程x2+y2=2(x+y)+xy的所有正整数解有( )
已知x2+xy-2y2=7,且x、y都是正整数,试求x、y的值.
已知x和y是正整数,并且满足条件xy+x+y=71,x2y+xy2=880,求x2+y2的值.
已知2x=3y,求xy/(x2+y2)-y2/(x2-y2)的值
已知xy满足x2+y2-6x+2y+10=0,求立方根号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