\[7y^{2} + 19y - 6 = 7 \cdot \left( y - \frac{2}{7} \right)(y + 3) =\]
\[= (7y - 2)(y + 3)\]
\[D = 361 + 168 = 529\]
\[y_{1} = \frac{- 19 + 23}{14} = \frac{4}{14} = \frac{2}{7};\ \ \ \ \]
\[y_{2} = \frac{- 19 - 23}{14} = - \frac{42}{14} = - 3.\]