Answer
(a) $g(3)=13$
(b) $g(-3)=13$
Work Step by Step
RECALL:
$g(a)$ represents the value of the function $g$ when $x=a$.
Replace $x$ with the given value to obtain:
(a)
$g(3) = 3^2+4
\\g(3)= 9+4
\\g(3)=13$
(b)
$g(-3) = (-3)^2+4
\\g(-3)= 9+4
\\g(-3)=13$
