Question

F(x)=x^2-5
g(x)=2x+7
Find (g o f) (x)

Answer 1

2x² - 3

Explanation:

note that (g ○ f)(x) = g(f(x))

substitute x = f(x) into g(x)

g(f(x)) = g(x² - 5 ) = 2(x² - 5) + 7 = 2x² - 10 + 7 = 2x² - 3