Answer:
(5, - 6)
Explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
(x - 5)² + (y + 6)² = 4² ← is in standard form
with (h, k) = (5, - 6) ← centre of circle