Question

Let f(x) = x - 2 and g(x) = x2 - 7x - 9. Find f(g(-1)).

Answer 1

$f(g(x))=x^2-7x-9-2=x^2-7x-11\\\\ f(g(-1))=(-1)^2-7\cdot(-1)-11=1+7-11=-3$