What is the greatest common factor of 12a and 9a2? a.9 b.36 c.3a d.12a2

The answer is

C. 3a

Step-by-step explanation:

The problem bothers on how well we understand our factorization

Step one

Now faced with the expression

12a and 9a²?

If we divide both 12 and 9 by 2,

12/2= 6

9/2=4.5

We see that 2 is not a common factor

Step two

If we decide to divide both numbers by 3

12/3=4

9/3=3

We now see that 3 is a common factor that divides well without a remmender

Step three

So let us try it with the Algeria expression

12a/3a=4

9a²/3a=3a

Hence the common factor is 3a