The GCF is 18ab.
6a
The GCF is 6ab
The GCF is 4.
Assuming A and B are equal to a and b, the GCF is 18ab. If not, it's just 18.
The GCF is 3a
18a^3bc
42 = 2 * 3 * 7 12 = 2 * 2 * 3 Hence gcf (42, 12) = 2 * 3 = 6 Notice that a is also a factor of 12a and 42a. Hence gcf (42a, 12a) = 2 * 3 * a = 6a
6ab
12a-a = 11a
-24
Yes, it is a 12a