#### Answer

(a) $h(5)=46$
(b) $h(-1)=-2$

#### Work Step by Step

RECALL:
$h(r)$ represents the value of the function $h$ when $r=x$.
Replace $r$ with the given value to obtain:
(a)
$h(5) = 2(5^2) -4
\\h(5)= 2(25)-4
\\h(5)=50-4
\\h(5)=46$
(b)
$h(-1) = 2(-1)^2-4
\\h(-1)=2(1)-4
\\h(-1)=2-4
\\h(-1)=-2$