Question

Using f(x) = 2x + 7 and g(x) = x - 3, find f(g(x)).

Answer 1

For every x in f(x), plug in (x-3), then simplify.

f(g(x))=2(x-3)+7

=2x-6+7

=2x+1

Answer 2

f(g(x)) = 2x + 1

Explanation:

f(g(x))

f(x - 3)

2(x - 3) + 7

2x - 6 + 7

2x + 1