Respuesta :

Answer:

f(5) = 10, but I didn't need to do synthetic division to get there.  So I may misunderstand the problem.

Step-by-step explanation:

f(x) = 3x^2 - 9x - 20

f(5) = 3 (5)^2 - 9*5 - 20

f(5) = 75 - 45 - 20

f(5) = 10