Answer
(a) domain $[-7,3]$ and range $[-5,5]$.
(b) not a function.
Work Step by Step
(a) Given $(x+2)^2+y^2=25$ which show a circle with center $(-2,0)$ and radius $5$, we can find the domain as $[-7,3]$ and range as $[-5,5]$.
(b) Rewrite the equation as $y=\pm\sqrt {25-(x+2)^2}$, and this does not form a function.
