Chapter 5 - Polynomials and Factoring - 5.2 Factoring Trinomials of the Type x2+bx+c - 5.2 Exercise Set - Page 317: 72

Answers vary.

One possible reason that Riley may do this is because it allows Riley to more easily see all of the possible factors, for prime factors are smaller, whereas writing out all of the normal factors can be cumbersome as 96 is a large number.