Question

F(x) = x + 2

g(x) = x - 4
(f g)(x) =
0 2x- 2
O x² – 8
o x² – 2x- 8
o x² + 2x - 8

Answer 1

(fg)(x) = x^2 -2x -8

Explanation:

(fg)(x) = f(x)·g(x) = (x +2)(x -4)

= x(x -4) +2(x -4) = x^2 -4x +2x -8

= x^2 -2x -8 . . . . matches the 3rd choice