How do you use the remainder theorem to find which if the following is not a factor of the polynomial #x^3-5x^2-9x+45#?
Since you did not supply the list referenced as "the following"
I will supply the binomial factors:
The remainder theorem says that
the remainder of
which implies that
Using the rational factor theorem we know that if
We can test all factors of
which tells us
Of course multiplicative combinations of these three should also be considered as factors.