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The question is incomplete in the sense that there is no +/- sign between q2 and 2q.
Considering plus '+' sign.
q3 - q2 + 2q - 2
q2(q - 1) + 2(q - 1)
(q2 + 2)(q - 1)
Considering minus '-' sign.
q3 - q2 - 2q - 2
The expression can't be factored.
However if we consider the question complete then it is written as:
q3 - q2(2q) - 2
q3 - 2q3 - 2
-q3 - 2
-(q + 21/3)(q2 - 21/3 + 22/3)
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