若x-y/x+y=2,则x2+2xy+y2/4xy=多少

若x-y/x+y=2,则x2+2xy+y2/4xy=多少 已知x.y满足X2-y2=2xy.则x-y/x+y=?x. 若2x+y=0则(x2+xy+y2)/(2xy-x2)的值 若|x-y|+（y+3）2=0,则x2+y2-2xy= 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 已知x2+2xy-2x+y2-2y+1=0,则x+y等于 若x2-2xy-y2-x+Y-1=0 求x-y的值 若x2-2xy-y2-x+Y-1=0 求x-y的值 若x2-xy-2y2=0,Xy不等于0,则X/Y=? 已知x2+xy=12,xy+y2=15,求(x+y)2-(x+y)(x-y)的值 (xy-x^2)-(x2-2xy+y^2)/xy×(x^2-y^2)/x^2 -xy-y^2 若x（y-1)-y(x-1)=4,则x2+y2/2-xy=_____________请尽快, 若实数x,y满足x2+y2+x2y2-4xy+1=0,则(x+y)2的值为 2x(x-y)4-x2(x-y)2+xy(y-x)2 如何因式分解 x2-2xy-3y2=0,其中x,y均不为零,求（y-x）/x2-xy/2x-y-y2/xy-x 若2x+y=0,求x的2次方-xy-y的2次方/3xy-x2次方 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?