I'm gonna feel really dumb asking this but how do you expand triple brackets?

I can do single and double brackets no problem with the FOIL method, but what multiplies with what when you have triple brackets?

Also I was hoping you could help me on a question also here it is:

$\displaystyle

x^3 - 2x^2 - 11x + 12 = 0$

I've deduced that $\displaystyle (fx = 1)$ because $\displaystyle 1^3 - 2 (1^2) - 11 (1) + 12 = 0

$

But what do I do next to factorise?

Thanks in advance!