Question

f(x) = x + 7
g(x)= 2x2 – 5x – 12
Find: g(f(x))

Answer 1

Answer:

$f(x) = x + 7 \\ g(x) = {x}^{2} - 5x - 12 \\ g(f(x)) = {x}^{2} - 5x - 12 + 7 \\ = {x}^{2} - 5x - 5$