已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y的值
已知实数x、y满足x2 4xy 4y2 x 2y-6=0,求6/x 2y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x2+4xy+4y2+x+2y-6=0,则x+2y的值为______.
已知实数x,y满足x2+y2-xy+x-1/2y+1/4=0 试求x,y的值
已知实数x、y满足2x2-7xy+3y2=0,求x:y
已知实数x,y满足x2+2xy+3y2-8y+6=0,求x,y的取值范围
已知实数x,y满足x2+y2-2x+2y=6求x2+y2的最值
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值
已知实数x,y满足x2+4xy+4y2-x-2y+14=0,则x+2y的值为 ___ .