\[4x^{2} + 7x - 2 = 0\]
\[D = 49 + 32 = 81\]
\[x_{1} = \frac{- 7 + 9}{8} = \frac{2}{8} = \frac{1}{4} = 0,25;\]
\[x_{2} = \frac{- 7 - 9}{8} = - 2.\]
\[Ответ:x = - 2;x = 0,25.\]