得到正解悬赏60若x,y满足|x-2013|+|y²+2012|=2012 求xy的值
若正数x,y满足x²-y²=2xy,求(x-y)/(x+y)的值
若x,y满足x^+2y^-2xy+1=0,求xy的值
若有理数X、Y满足x²-4x+y²+6y+13=0,求xy的值
正数x,y满足x²-y²=2xy,求x-y/x+y的值
若正数x,y满足x平方-y平方=2xy,求x-y除以x+y的值
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/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
若x、y满足|x+1|+|y-2013|≤0,求xy的值
若正实数x,y满足2x+y+6=xy,求xy的最小值.
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x²y+xy²=20,xy+x+y=9,求x²+y²的值.