Factor completely.

Each term has 3v^2 available:

3v^2(3v^2 + 8v + 4)

Next, we factor out the (3v^2 + 8v + 4):

(3v^2 + 8v + 4) -->

(3v + 2)(v + 2)

Putting it all together, we have:

3v^2(3v + 2)(v + 2)