Consider this function: f(x) = (16x^3 + 27) (2x^2 + 13x + 15)

Select ALL statements that are true about this function.

a) 16x^3 + 27 is irreducible over the integers
b) 2x^3 + 13x + 15 is irreducible over the integers
c) 4x + 3 is a factor
d) x + 5 is a factor