OK.. I think I understand Combinatorics now.
Quadratics I sorta of understand better, yet not comfortably. The problem is there are not many quadratic questions in the Official Gmat guide book. Which leads me to think there are not that many on the real test, most likely not a good thing to assume. I will have to google this more today while at work.
PS I really don't want to go to work today. I hate that place/job/industry/staff
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