Question

finding the GCF

Factor into primes: 21^2
a. 3*7*2*x*x
b.3*7*x*x
c.3*3*4*x*x

Factor into primes: 12xy^3
a.2*2*3*x*y*y
b.2*2*3*x*y*y*y
c.2*2*3*x*x*x*y*y*y

Find the Greatest Common Factor (GCF) of 3a^2, 6a?
a.3a
b.6a
c.9a

Find the Greatest Common Factor (GCF) of 4ab, 12a?
a.4ab
b.8a
c.4a