It reminds me of the "box method"

If you have a trinomial, then write out a box like this:

Now you need to fill in the two empty squares. The trick is that they add to "b" and multiply to "ac", I'll use as an example:Code::-----:-----: : a : : :-----:-----: : : c : :-----:-----:

Then find the greatest common factor of each row and collum:Code::-----:-----: : 2 : 2 : :-----:-----: : 3 : 3 : :-----:-----:

So:Code:1 1 :-----:-----: 2 : 2 : 2 : :-----:-----: 3 : 3 : 3 : :-----:-----: