Question

If f(x) = x+4 and g(x) = 2x2-x-1, evaluate the composition (g o f)(2).

Answer 1

65

Explanation:

Evaluate f(2) then substitute the value obtained into g(x), thus

f(2) = 2 + 4 = 6, then

g(6) = 2(6)² - 6 - 1 = 72 - 6 - 1 = 65