![\boxed{3x+ 1}](/tpl/images/0306/1949/e951d.png)
Step-by-step explanation:
If we know one of the factors, we should be able to divide the trinomial by the binomial and find the other factor
Perhaps the best way to solve this problem is to use long division.
3x + 1
2x + 3)6x² + 11x + 3
6x² + 9x
2x + 3
2x + 3
0
![\text{The other factor is }\boxed{\textbf{3x + 1}}](/tpl/images/0306/1949/be9ca.png)