Question

Find the center and radius of circle and graph it

`x^(2) + y^(2) = 15`

Answer 1

x² + y² = 15

(x-a)² + (y-b)² = r²

(x-0)² + (y-0)² = (√15)² center is at (a,b) which is (0,0)

and radius is: r = (√15)² = √15

center: (0,0)

radius: √15

hope it helps!