Answer:
[tex]3(10a + 13b)[/tex]
Step-by-step explanation:
1) Find the Greatest Common Factor (GCF).
GCF = 3
2) Factor out the GCF. (Write the GCF first. Then, in parentheses, divide each term by the GCF.)
[tex]3( \frac{30a}{3} + \frac{39b}{3} )[/tex]
3) Simplify.
[tex]3(10a + 13b)[/tex]
Therefor, the answer is 3 ( 10a + 13b)