已只x.y满足x^2+2y^2-2xy-xy+1=0,求x+2y的值.
已只x.y满足x^2+2y^2-2xy-xy+1=0,求x+2y的值.
若x,y满足x^+2y^-2xy+1=0,求xy的值
正数xy满足x2-y2=2xy,求x+y分之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的平方+2y的平方-2xy-2y+1=0,求(x+y)的xy次方的值.
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
已知实数x y满足x×x+y×y-xy+2x-y+1=0 试求x y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