Question

Let f(x) = x2 - 3x - 7. Find f(-3).

Answer 1

If f(x)=x^2 - 3x - 7
Then x=-3.
-3^2 - 3(-3) - 7
9 --9 - 7
9+9-7
18-7
f(-3)=11

Answer 2

You can also do it using synthetic substitution if you would like to see that as well?