Question

Quation for the circle with center (6,-3) and radius 9?

Answer 1

(x - 6)² + (y + 3)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 ) = (6, - 3 ) and r = 9 , then

(x - 6)² + (y - (- 3) )² = 9² , that is

(x - 6)² + (y + 3)² = 81