Решите графически уравнение -x^2-2x+8=0.

Question

Вопрос:

Ответ:

Accepted Answer

\[- x^{2} - 2x + 8 = 0\]

\[y = - x^{2} - 2x + 8\]

\[x_{b} = - \frac{b}{2a} = \frac{2}{- 2} = - 1\]

\[y_{b} = - 1 + 2 + 8 = 9\]

\[x\]	\[- 4\]	\[- 3\]	\[- 2\]	\[- 1\]	\[0\]	\[1\]	\[2\]
\[y\]	\[0\]	\[5\]	\[8\]	\[9\]	\[8\]	\[5\]	\[0\]

\[Ответ:\ - 4;2.\ \]