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1. $x^{2} - x - 6 = 0$

Answer: Option C

Explanation:

x^{2} - x - 6 = 0 \Rightarrow x^{2} - 3 x + 2 x - 6 = 0 \Rightarrow x (x - 3) + 2 (x - 3) = 0 \Rightarrow (x + 2) (x - 3) = 0 S o, x = 3 o r, x = - 2

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