\[y = 3x^{2} + bx + c;\ \ A( - 2;1);\]
\[x_{0} = - \frac{b}{2a}\]
\[- 2 = - \frac{b}{6}\]
\[- b = - 12\]
\[b = 12.\]
\[3 \cdot 4 + 12 \cdot ( - 2) + c = 1\]
\[12 - 24 - 1 + c = 0\]
\[c = - 13.\]
\[Ответ:при\ b = 12;c = - 13.\]