Question

the functions f and g are defined as follows.
$f(x)=2x+2$ $g(x)=-4x^2 -3$
find $f(-5)$ and $g(4)$.
simplify your answers as much as possible.
$f(-5) = \square$
$g(4) = \square$

Explanation:

Step1: Substitute $x=-5$ into $f(x)$

$f(-5)=2(-5)+2$

Step2: Calculate $f(-5)$

$f(-5)=-10+2=-8$

Step3: Substitute $x=4$ into $g(x)$

$g(4)=-4(4)^2-3$

Step4: Calculate $g(4)$

$g(4)=-4(16)-3=-64-3=-67$

Answer:

$f(-5) = -8$
$g(4) = -67$