Решение:
\[ 2x^2 + 9x - 11 = 0 \]
\[ D = 9^2 - 4 \times 2 \times (-11) = 81 + 88 = 169 \]
\[ x_1 = \frac{-9 + \sqrt{169}}{2 \times 2} = \frac{-9 + 13}{4} = \frac{4}{4} = 1 \] \[ x_2 = \frac{-9 - \sqrt{169}}{2 \times 2} = \frac{-9 - 13}{4} = \frac{-22}{4} = -5.5 \]
Ответ: 1; -5.5