Question

(20p) Write the equation that represents a circle with center (−10, −6) and radius 9 units.

Answer 1

Explanation:

The equation of the circle is (x + 10)² + (y + 6)² = 81.

Answer 2

The equation of a circle is:

(x−x0)2+(y−y0)2=R2

where x0 and y0 are the center of the circle (x0,y0) and R is the radius of the circle.

Explanation: