Step 1
Given;
[tex]\begin{gathered} \frac{18b^3+12b^2+6b}{6b} \\ Factor\text{ the numerator } \\ 6b(3b^2+2b+1) \end{gathered}[/tex]
Thus;
[tex]\begin{gathered} 18b^3+12b^2+6b=6b(3b^2+2b+1) \\ \frac{6b(3b^2+2b+1)}{6b}=3b^2+2b+1 \end{gathered}[/tex]Answer;
[tex]3b^2+2b+1[/tex]