for the function f (x) =ax^3 - ax^2 - ax - 5 , f(1) =3 what is the value of f (-2)?

Question

please im having problem with my homework

Answer 1

f(1) = a - a - a - 5

3 = -a - 5

8 = -a

-8 = a

Now substitute for a and calculate f(-2).