\[\begin{array}{l}{\text{Решите систему уравнений:}}\\\left\{ \begin{array}{l}3{x^2} - {y^2} = 11\\{x^2} + 2 \cdot \left| x \right| \cdot \left| y \right| - {y^2} = 7\end{array} \right.\end{array}\]