Question

[ f(x) = 3x + 2 g(x) = x2 Find gf(5) Find fg(x)

Answer 1

Answer:

gf(5) = 289.

fg(x) = 3x^2 + 2.

Step-by-step explanation:

f(5) =  3(5) + 2 = 17

So gf(5) = 17^2 = 289.

fg(x) =  3(x^2) + 2   (we replace the x in f(x) by g(x)).

= 3x^2 + 2.