Question

How do you do this and what is the answer?

Answer 1

Answer:

a) $f(-4) = 19$

b) $f(0) = 3$

Step-by-step explanation:

When working with these type of problems, they give you a function, which in this case is $f(x)$, and they give you what that function is equal to, it's value, which in this case is $x^{2} + 3$.

• When working with letter a), the function is $f(-4)$, meaning all the variables in the expression will be -4.

• When working with letter b), the function is $f(0)$, meaning all the variables in the expression will be 0.

First let's work with letter a), (-4).

$f(x) = x^{2} + 3$

$f(-4) = -4^{2} + 3$

$f(-4) = 16 + 3$

$f(-4) = 19$

Let's now work with letter b), (0).

$f(x) = x^{2} + 3$

$f(0) = 0^{2} + 3$

$f(0) = 0 + 3$

$f(0) = 3$

Hope it helped,

BiologiaMagister