Question

F(x)=5x-1 and g(x)=x^2-4 find (fog)(-5)

Answer 1

We calculate g(-5); then f(g(-5));

g(-5) = (-5)^2 - 4 = 25 - 4 = 21;

f(g(-5)) = f(21) = 5 x 21 - 1 = 105 - 1 = 104;

Explanation: