Řeš v \( \mathbb{R}\times\mathbb{R} \) soustavu rovnic:
\( \begin{array}{l}4 x^{2}-y^{2}=15 \\ 2 x+y=1\end{array} \)
\( K=\{[4 ;-6]\} \)
\( K=\{[4 ;-7]\} \)
\( K=\{[5 ;-7]\} \)
\( K=\{[3 ;-7]\} \)