Answer:
(- 7, 4 ) and 7
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 + 7)² + (y - 4)² = 49 , that is
(x - (- 7))² + (y - 4)² = 7² ← is in standard form
with centre = (h, k) = (- 7, 4) and r = 7