Question

Can someone help? I'm a confused.
If g(x) = x^2 + 2, find g(3).

9

8

11

6

Answer 1

well just put the value in the function\[g(3)=3^2+2=?\]

Answer 2

makes sense?

Answer 3

I got g=11/3

Answer 4

oh No, the problem do not asks you to evaluate g but g(3)

Answer 5

here g(x) is a function and x is independent variable

Answer 6

use 3 in place of x and evaluate (solve)

Answer 7

algebra is confusing sometimes.

when you see g(x) = x^2 +2

the g(x) does not mean g times x
so you have to remember: g(x) (written exactly that way)
means g(x) is a short-cut name for x^2 +2

when they write g(3), that is a short-cut way to write 3^2 +2
(they replace the x with a 3)

the answer is just the part: 3^2+2
= 11

Answer 8

Wow, thank you guys! @mukushla thank you for helping me so I know what to do. And thank you @phi for going step by step!

Answer 9

np :)

Answer 10

So then, heres another, to see if I can get it. The question is if g(x) = 3(x - 2), find the value of x if g(x) = 6

Answer 11

It would be 4? Right?

Answer 12

g(x) = 3(x - 2)
replace g(x) with 6
6= 3(x-2)

divide both sides by 3
2 = x-2
add 2 to both sides
4= x

yes, x is 4

Answer 13

Awesome!! THANK YOU!