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Answers by Miles A.

There are several resources on the internet that can help you out. You can begin by watching this video on youtube: http://www.youtube.com/watch?feature=player_embedded&v=Kz7lUvl43hM You can read a tutorial here: http://www.mathwarehouse.com/algebra/factor/how-to-factor-trinomials-step-by-step...

The ! in n! means n-factorial. A factorial is the product of all positive integers less than n.   To read more about factorials, visit this page on wikipedia: http://en.wikipedia.org/wiki/Factorial ;