已知x*y=8满足x^2y-xy^2-x+y=56.求x^2+y^2的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*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x×x+y×y-xy+2x-y+1=0 试求x y的值
正数x,y满足x^2-y^2=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
若正数x,y满足x²-y²=2xy,求(x-y)/(x+y)的值
正数x、y满足x平方减去y平方=2xy,求(x-y)/(x+y)的值
正数x,y满足x²-y²=2xy,求x-y/x+y的值
已知xy满足x^2+y^2+4/5=2x+y 求代数式yx/x+y的值
已知实数xy满足x^2+y^2-6x+4y+13=0求x^y的值
已知实数X.y满足X^2+xy-y^2=0,求x/y的值