Question

Let f(x) = x + 8 and g(x) = x^2 - 6x - 7. Find f(g(2)).

Can you explain me how to do that?
Help, please?

Answer 1

start by finding g(2)
plug the result into f(x)

Answer 2

You mean g(2) = 2^2 - ^6(2) - 7?

Answer 3

Yes

Answer 4

And then f(g(2)) = x(2^2 - ^6(2) - 7) + 8? Am I correct?

Answer 5

heck yeah

Answer 6

Thank you :)

Answer 7

\[f(g(2)) = g(2) + 8\]

Answer 8

oh I didn't notice the x

Answer 9

there's also an extra ^ for some reason

Answer 10

Eh, I am lost...?

Answer 11

Ok solve for g(2) fist. What do you get?

Answer 12

It is 2^2 - ^(2) - 7?

Answer 13

I am not sure what `^(2)` means.

Answer 14

it is 2 square?

Answer 15

\[g(2) = (2)^2 -6(2) -7 =~?\]

Answer 16

Then it is 4 - 12 - 7 = -15?

Answer 17

yes.

Answer 18

Now.... \[f(g(2)) = -15 + 8=~?\]

Answer 19

Um, but what about x + 8?
But answer is -7

Answer 20

Exactly. What is -15 + 8?

Answer 21

Oh, it is -7... Thank you :D

Answer 22

You're thinking too hard.

Answer 23

Hahaha, sorry.