Question

Find the equation of circle with centre (0 0) and radius 3

Answer 1

${x}^{2} + {y}^{2} = {3}^{2}$

Answer 2

Equation of circle--

(x -a)² + (y - b)² = r²

Here a = 0 and b = 0,

So, (x - 0)² + (y - b)² = 3²
x² + y² = 9

Required answer - x² + y² = 9

Hope This Helps You!