I used the generic rectangle/diamond method, although the quadratic formula would work just as well with a=3, b=11, c=6. Put that into the quadratic formula
![\frac{-b+/- \sqrt{b ^(2)-4ac } }{2a}](https://img.qammunity.org/2019/formulas/mathematics/high-school/9b8lpn72b0zb70iommxx7nx55gp6zvwflx.png)
to get that your factors are x = -2/3 and -3. Putting those into factorization form you get the 2 factors as (3x+2)(x+3)