\[x_{1} = - 1\ \ и\ \ x_{2} = 3\]
\[x_{1} + x_{2} = - 1 + 3 = 2\]
\[x_{1} \cdot x_{2} = - 1 \cdot 3 = - 3\]
\[Уравнение:\]
\[x² - 2x - 3 = 0\]