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1. $x^{3} + h x + 10 = 0$

Answer: Option C

Explanation:

x^{3} + h x + 10 = 0 \Rightarrow (2)^{3} + h (2) + 10 = 0 \Rightarrow 8 + 2 h + 10 = 0 \Rightarrow 2 h + 18 = 0 \Rightarrow 2 h = - 18 \Rightarrow h = - \frac{18}{2} \Rightarrow h = - 9

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