已知实数x,y满足x2+3y2+6x-12y+21=0,求x,y的值
已知实数x,y满足x2+3y2+6x-12y+21=0,求x,y的值
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)-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+y2=4,求x+y的取值范围
已知实数x、y满足2x2-7xy+3y2=0,求x:y
已知实数x,y 满足x2+y2+2x-2√3y=0求:
已知实数x,y满足x2+y2+4x-6y+13=0,求yx的值.
已知实数x,y满足:x2+3y2-3=0,求x+y的取值范围.
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+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足x2+y2+4x+3=0,求(y-2)/(x-1)的值域.