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