Maths halp D:

WTF? Where did you get that? If it's high school then you'll have to wait for me to get there, but I do understand Math very well.

first off you put the (x-2) to the front:
(x-2) * (x^2*(x+2)-1)
then you just solve the last thingy and get:
(x-2) * (x^3 + 2x^2 -1)
finished. No money needed.

Simple term modification. Don't know the english word for it...unbracketing? xD so you take the (x-2) and pull it out of the term, makin it (x-2) * (some bracket where no (x-2) is in anymore). Then (x-2) gets 1 (as (x-2) * 1 = (x-2)) and the other term gets x^2 * (x+2).

Ez algebra .

We have to learn that shit in year 11