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