Like, where does the “-1” come from? I feel like I am missing something painfully obvious…
Better format:
Factor x^(2)(x + 2) – (x + 2) = (x + 2)(x^(2) – 1) = (x + 2)(x – 1)(x + 1)
I understand that you’re supposed to factor out the (x+2), but for some reason I can’t grasp the sequence of orders happening there…
In: 0
When you factor out the (x+2) you’re having to divide the remaining components by that value.
x^(2)(x+2) / (x+2) is just x^2
-(x+2) / (x+2) is just -1
Ergo, (x+2)(x^(2)-1).
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