2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/94975Let f in Z[x,y] be a reducible homoegeneous polynomial of degree 3. We show that f(x,y) has an even number of prime factors as often as an odd number of prime factors.22 pages, gap in section 2.5 fixed; minor changes elsewhereNumber Theory11N32; 11N35, 11N36text