\[\text{\ \ }x(x + 5) - 76 > 5 \cdot (x - 8)\]
\[x^{2} + 5x - 76 > 5x - 40\]
\[x^{2} - 36 > 0\]
\[x^{2} - 36 = 0\]
\[x^{2} = 36\]
\[x = \pm 6\]
\[Ответ:x \in ( - \infty; - 6) \cup (6; + \infty).\]
\[\ (x - 6)(x + 9) > 0\]
\[(x - 6)(x + 9) = 0\]
\[x - 6 = 0\ \ \ \ \ \ \ \ x + 9 = 0\]
\[x = 6\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - 9\]
\[Ответ:x \in ( - \infty; - 9) \cup (6; + \infty).\]