Question

What is the greatest common factor of 10b^2 and 30? A. 2 B. 5b C. 10b D. 10

Answer 1

$\begin{gathered} \text{Factors of 10:} \\ 1,2,5,10 \\ \text{ Factors of 30:} \\ 1,2,3,5,10,15,30 \\ \text{GCF:} \\ 10 \\ 10b^2+30=10(b^2+3) \end{gathered}$

Answer:

D. 10