\[f(x) = - x^{2} - 4x + 1\]
\[x_{0} = - \frac{b}{2a} = - \frac{- 4}{- 2} = - 2;\]
\[y_{0} = - ( - 2)^{2} - 4 \cdot ( - 2) + 1 =\]
\[= - 4 + 8 + 1 = 5.\]
\[Ответ:( - 2;5).\]