\[= - 4a^{2} + 66a - 62 < 0\]
\[- 2a^{2} + 33a - 31 < 0\]
\[D = 1089 - 248 = 841\]
\[a_{1} = \frac{- 33 + 29}{- 4} = 1\]
\[a_{2} = \frac{- 33 - 29}{- 4} = 15,5\]
\[Ответ:( - \infty;1)(15,5;\ + \infty).\]