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+21=0
◯ x²+y²−12x+2y+33=0
◯ x²+y²+12x−2y+21=0
◯ x²+y²+12x−2y+33=0