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1. $2 x^{2} + x - 15$

Answer: Option A

Explanation:

2 x^{2} + x - 15 = 2 x^{2} + 6 x - 5 x - 15 = 2 x (x + 3) - 5 (x + 3) = (2 x - 5) (x + 3)

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