Question

Given f(x) = x - 7 and g(x) = x2.
Find g(f(4)).

Answer 1

g(f(4)) means to first find f(4) and then use that result as the input for g(x).

So,

f(4) = 4 - 7 = -3

then we use the result, -3 as the input for g(x)

g(-3) = (-3)^2 = 9

Therefore, g(f(4)) = 9