Question

Let f(x)=x²-9, g(x) = 2x. Find (fg)(6).

Answer 1

135

Explanation:

g(6) =2×6 =12

(fg)(6) is f(g(6))= f(12)= 12²-9 =144-9 =135

Answer 2

First of all you need to put 6 in each functions

thus we would have:

g(6)= 12

f(6)= 27

and then 12×27 would be the answer