8. The system of equations $\left\{\begin{array}{l}x+x y+y=1, \\ x^{2}+x^{2} y^{2}+y^{2}=17\end{array}\right.$ has the real solution $(x, y)=$
$\begin{array}{l}\text { 8. }\left(\frac{3+\sqrt{17}}{2},\right. \\ \left.\frac{3-\sqrt{17}}{2}\right) \text { or }\left(\frac{3-\sqrt{17}}{2}, \frac{3+\sqrt{17}}{2}\right)\end{array}$