Question

the GCF 28a^3b and 16ab^2

A)4ab
B)4a^3b
C)28ab
D)112a^3b^2

Answer 1

The GCF of 28 and 16 is 4 since 28/4=7 and 16/4=4 and 7 and 4 are relatively prime. The gcd of a^3 and a is a. The gcd of b and b^2 is b. Thus, the gcd of the whole thing is 4ab so A is the answer.