过点A(-1,5),B(5,5),(-1+5)/2=2,则圆心在x=2上设圆方程为(x-2)^2+(y-b)^2=r^2将(5,5)和(6,-2)代入得9+(5-b)^2=r^216+(-2-b)^2=r^29+(5-b)^2=16+(-2-b)^2解得b=1代入可得r=5所以圆的方程为(x-2)^2+(y-1)^2=25...