\[2x^{2} - x + 11 = 0\]
\[D = 1 + 48 = 49\]
\[x_{1} = \frac{1 + 7}{4} = 2;\]
\[x_{2} = \frac{1 - 7}{4} = - \frac{6}{4} = - 1,5.\]
\[Ответ:x = - 1,5;x = 2.\]