Question

WILL FAN AND MEDAL! :)
If f(x) = 2x2 + 4, find f(3).

22

16

-0.5

40

Answer 1

Just plug in 3 in for x.

Answer 2

So \(f(3)=2(3)^2+4\)

Answer 3

Do you know what \(3^2=?\)

Answer 4

@domisreallytall

Answer 5

9

Answer 6

Yes and \(9\times2=?\)

Answer 7

18

Answer 8

22

Answer 9

f(3)=22

Answer 10

And finally \[18+4=?\]

Answer 11

thanks !

Answer 12

So yes. f(3)=22
Good Job and thanks for participating.

Answer 13

but dont you need to find the value of your variable, f,?

Answer 14

no.. f(x) is nothing but y