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