Answer:
The equation of the given circle is:
(x + 3)² + (y + 7)² = 121
This equation is in standard form, which is:
(x - h)² + (y - k)² = r²
where (h, k) is the center of the circle and r is its radius.
Comparing the given equation with the standard form, we can see that:
The center of the circle is (-3, -7) (note the signs of h and k).
The radius of the circle is √121 = 11 (since r² = 121, then r = √121 = 11).
Therefore, the radius of the given circle is 11 units.
Explanation: