Find the greatest common factor (GCF/HCF) of the following polynomials:

15a³, - 54a², -150a

The numerical coefficients of given numerical are 15, -45, -150

Greatest common factor of 15, -45, -150 is 15.

Common literals appearing in given numerical is smallest power of a in three monomials = 1

Monomials of common literals with smallest power= a

Hence, the greatest common factor = 15a