The center of a circle is located at (6, −1) . The radius of the circle is 4. What is the equation of the circle in general form? x2+y2+12x−2y+33=0 x2+y2−12x+2y+33=0 x2+y2+12x−2y+21=0 x2+y2−12x+2y+21=0
+99 
