\[\boxed{\text{366}\text{\ (366)}\text{.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = ax^{2} + bx - 4\]
\[\left\{ \begin{matrix} 9a - 3b - 4 = 8 \\ a + b - 4 = 4\ \ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ }\]
\[\ \left\{ \begin{matrix} 9a - 3b = 12 \\ a + b = 8\ \ | \cdot 9 \\ \end{matrix} \right.\ \]
\(\left\{ \begin{matrix} 9a - 3b = 12 \\ 9a + 9b = 72 \\ \end{matrix} \right.\ \ \ | -\)
\[- 12b = - 60\]
\[b = 5\]
\[a + 5 = 8\]
\[a = 3\]
\[Ответ:a = 3;\ \ b = 5.\]