\[y = - x^{2} - 2x + 3 \Longrightarrow ветви\ \]
\[вниз\]
\[x_{0} = \frac{2}{- 2} = - 1;\ \ \]
\[y_{0} = - 1 + 2 + 3 = 4\]
\[( - 1;4).\]