\[y = - 4x^{2} + bx + c;\ \ A(3;1).\]
\[1)\ x_{0} = - \frac{b}{2a}\]
\[3 = - \frac{b}{- 8}\]
\[3 = \frac{b}{8}\]
\[b = 24.\]
\[2) - 4 \cdot 9 + 24 \cdot 3 + c = 1\]
\[- 36 + 72 + c = 1\]
\[c = 1 - 36\]
\[c = - 35\]
\[Ответ:при\ b = 24;\ \ c = - 35.\]