Question

Let f(x) = - 4x - 1 and g(x) = x2 + 3.

Find (fog)(4)
Then (fog)(4) =
. (Simplify your answer)​

Answer 1

- 77

Explanation:

To evaluate, substitute x = 4 into g(x) then substitute the value obtained into f(x).

g(4) = 4² + 3 = 16 + 3 = 19

f(19) = (- 4 × 19) - 1 = - 76 - 1 = - 77