\[y = x^{2} + bx + c;\ \ \]
\[вершина\ \ K(7;2)\]
\[m = - \frac{b}{2} = 7\]
\[- b = 2 \cdot 7\]
\[b = - 14.\]
\[n = y(7) = 49 - 14 \cdot 7 + c =\]
\[= c - 49\]
\[c - 49 = 2\]
\[c = 51.\]
\[Ответ:при\ b = - 14;\ \ c = 51.\]