\[3x² - 11x + 6 = 0\]
\[D = 121 - 72 = 49\]
\[x_{1} = \frac{11 + 7}{6} = \frac{18}{6} = 3;\ \ \ \]
\[x_{2} = \frac{11 - 7}{6} = \frac{4}{6} = \frac{2}{3};\]
\[3x^{2} - 11x + 6 = 3 \cdot (x - 3)\left( x - \frac{2}{3} \right) =\]
\[= (x - 3)(3x - 2).\]