-2
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(x2 - x - 6)/(x2 - 4)
= [(x - 3)(x + 2)]/[(x - 2)(x + 2)]
= [(x - 3)/(x - 2)][(x + 2)/(x + 2)]
= (x - 3)/(x - 2)
22
x2/(-x) = -x.
I think you've left out something. Is one of the "x" functions squared?
8 + X SQUARED
-3