Question

What’s the equation of the circle?

Answer 1

(x + 1)² + (y + 1)² = 9

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 ) = K (- 1, - 1 ) and r = 3 , then

(x - (- 1) )² + (y - 1) )² = 3² , that is

(x + 1)² + (y + 1)² = 9