The answers for this question are 2 , 3 , and 5. these 3 make the most sense.
Answer:
7x^2a
Step-by-step explanation:
7x^3a+7x^2a^2
7x^3a = 7 xxxa
7x^2a^2= 7 xxaa
The common terms are 7xxa
7x^2a
This is the greatest common factor
Answer:
Step-by-step explanation:

From the initial condition,

So we have that 
Apologies for the bad handwriting.