| p{6cm}} (2) $\left(-1, -\dfrac{2}{4}\right)$ | (1) $\left(-\dfrac{2}{4}, -\dfrac{1}{2}\right)$ |
| [14pt] (4) $\left(0, \dfrac{1}{2}\right)$ | (3) $\left(-\dfrac{1}{2}, 0\right)$ |
\textbf{115-} One of the real roots of the equation $x^3 + 2x^2 - 4x - 3 = 0$ lies in which open interval?
\begin{tabular}{p{6cm} p{6cm}}
(2) $\left(-1, -\dfrac{2}{4}\right)$ & (1) $\left(-\dfrac{2}{4}, -\dfrac{1}{2}\right)$ \\[14pt]
(4) $\left(0, \dfrac{1}{2}\right)$ & (3) $\left(-\dfrac{1}{2}, 0\right)$
\end{tabular}
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