Answer:
3
Step-by-step explanation:
We are given that an expression
[tex]3a^2+9[/tex]
We have to find the greatest common factor of [tex]3a^2+9[/tex]
In order to find the GCF we will find the factor of each term
[tex]3a^2=3\times a\times a[/tex]
[tex]9=3\times 3[/tex]
The common factor in both terms is 3.
Hence, greatest common factor of [tex]3a^2+9[/tex] is 3.
Answer: 3
