\[3x^{2} - 11x + 7 = 0\ \ \ \ \]
\[D = 121 - 84 = 37\]
\[x_{1} = \frac{11 + \sqrt{37}}{6};\ \ x_{2} = \frac{11 - \sqrt{37}}{6}\]
\[Ответ:\frac{11 \pm \sqrt{37}}{6}.\]