Answer:
centre = (- 5, - 2 ) , radius r = 18
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 the radius
(x + 5)² + (y + 2)² = 324 ← is in standard form , that is
(x - (- 5))² + (y - (- 2))² = 18²
with centre = (- 5, - 2 ) and r = 18