Question

Let f(x) = x – 2 and g(x) = 3x + 4. What is f(g(x)) ?

Answer 1

I believe it should be like this.
x-2(3x + 4)
now use the foil method
= 3x^2 + 4x - 6x -8
= 3x^2 -2x - 8

Answer 2

Thank you :)

Answer 3

and to solve further if u want to find what the value of f, u will factorize
3x^2 - 2x -8
(3x + 4) (x-2)
3x + 4 = 0 or x-2=0
3x = -4
x = -4/3 or x=2