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

Question

Вопрос:

Ответ:

Accepted Answer

\[x² - 2x - 8 = 0\]

\[y = x² - 2x - 8\]

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

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

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

\[Ответ:\ - 2;4.\ \]