Question

Find the center, radius, and intercepts of the following circles: x^2+y^2=9

Answer 1

\[x ^{2}+y ^{2}=49\]

Answer 2

ok if center is (h,k)
then equation is
(x-h)^2 + (y-k)^2 = r^2

so center is (0,0)
radius is sqrt(49) = 7

intercepts, plug in x=0, then y=0
either way you get +-7