Вопрос:

Ответ:

\[x² - 2x - 8 < 0\]

\[x^{2} - 2x - 8 = 0\]

\[x_{1} + x_{2} = 2;\ \ x_{1} \cdot x_{2} = - 8\]

\[x_{1} = - 2;\ \ \ \ \ x_{2} = 4\]

\[(x + 2)(x - 4) < 0\]

\[Ответ:( - 2;4).\]