Question

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

Answer 1

Answer:

$g(f(x)) = gof(x) =( x - 7)^{2} \\ = {x}^{2} - 14x + 49 \\ g(f(4) )\times g(f(4)) = (4^{2} - 14 \times 4 + 49 )\times( 4 ^{2} - 14 \times 4 + 49) \\ = 9 \times 9 \\ = 81$