Question

Help with Algebra 2

Answer 1

(h, k) is the center, ok? and radius = r

standard form -> (x-h)^2 +(y-k)^2 = r^2
sub in your info

(x-4)^2 +(y-4)^2 = r^2

need to find distance between center and point on circle to get radius

radius is sqrt5

final equation:

(x-4)^2 +(y-4)^2 = (sqrt5)^2
(x-4)^2 +(y-4)^2 = 5