The given trinomial is:
[tex]x^2-3x-40[/tex]
It is required to choose the first step in the process of factoring the trinomial.
Recall that the first step in the process of factoring all trinomials is to list all the factors of the whole number in the constant term.
Hence, the first step for the given trinomial is to list all the factors of 40.
Option C is the answer.
