Question

F(x) = x − 2 and g(x) = x2 − 7x − 9. find f(g(−1)).

Answer 1

$f(x)=x-2;\ g(x)=x^2-7x-9\\\\g(-1)=(-1)^2-7\cdot(-1)-9=1+7-9=8-9=-1\\\\f(g(-1))=f(-1)=-1-2=-3$