\[7x^{2} + 6x - 1 = 0\]
\[D_{1} = 9 + 7 = 16\]
\[x_{1} = \frac{- 3 + 4}{7} = \frac{1}{7};\]
\[x_{2} = \frac{- 3 - 4}{7} = - 1.\]
\[Ответ:x = - 1;x = \frac{1}{7}.\]