how would i solve this:
If f(x) = 2x2 + 4, find f(3).

1) 22

2) 16

3) −0.5

4) 40

Question

how would i solve this: 
If f(x) = 2x2 + 4, find f(3).

1) 22

2) 16

3) −0.5

4) 40

mxddi3 · Answer

so we have $$f(x)=2x^2+4$$
and we need to find f(3). 
To do so, plug 3 in wherever you see an "x"
This looks like: $$f(3)=2(3)^2+4$$

from here you just simplify.

Dileiny · Answer

$\color{#0cbb34}{\text{Originally Posted by}}$ @mxddi3
so we have $$f(x)=2x^2+4$$
and we need to find f(3). 
To do so, plug 3 in wherever you see an "x"
This looks like: $$f(3)=2(3)^2+4$$

from here you just simplify.
$\color{#0cbb34}{\text{End of Quote}}$
Couldnt said it better myself lmao

XxAngelGirlxX · Answer

f(x) = 2x^2 + 4

f(3) means putting 3 instead of x in the previous equation

f(3) = 2· 3^2 + 4 = 2· 9 + 4 = 18 + 4 = 22