Question

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

-21

-3

3

21

can someone explain how to do this?

Answer 1

sub -1 for x in g(x) equation to solve for g(-1) then use g(-1) and sub it into the x of the f(x) equaation to solve for f(g(-1))

Answer 2

thanks