How would I go about solving this?

Answer:
The answer to your question is letter A and letter B
Step-by-step explanation:
The center of a circle has two coordinates x and y. The x-coordinate is nest to the x and the y coordinate next to the y. But we change their signs.
(x - 13) the x-coordinate is 13
(y - 1) the y-coordinate is 1
Center = (13, 1)
The radius of a circle is in the right part of the equation but we need to get the square root of this number.
r² = 4; r = 2