Explanation:
To find the center, we can use the fact that it is the midpoint of the diameter. In this case, this means the center is (-5, 3).
To find the radius, we can use the fact that the radius is half the length of the diameter. Since the diameter has a length of 14, the radius is 7.
Therefore, the equation is (x+5)^2 + (y-3)^2 = 49.