\[- \frac{1}{4}\ и\ \ 3\]
\[x_{1} + x_{2} = - \frac{1}{4} + 3 = 2\frac{3}{4} = \frac{11}{4};\ \]
\[x_{1} \cdot x_{2} = - \frac{1}{4} \cdot 3 = - \frac{3}{4}.\]
\[Уравнение:\]
\[x^{2} - \frac{11}{4}x - \frac{3}{4} = 0\]
\[\Longrightarrow 4x^{2} - 11x - 3 = 0.\]