\[\boxed{\mathbf{925\ (925).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\left\{ \begin{matrix} y = 8x + b \\ y = x^{2}\text{\ \ \ \ \ \ \ } \\ x = 0\ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[8x + b = x^{2}\text{\ \ }\]
\[b = x^{2} - 8x = 0 - 8 \cdot 0 = 0\]
\[Ответ:при\ b = 0.\]