Answer:
(x + 2)² + (y - 8)² = 81
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
Here (h, k) = (- 2, 8) and r = 9, thus
(x - (- 2))² + (y - 8)² = 9², that is
(x + 2)² + (y - 8)² = 81