Řeš v \( \mathbb{R} \) rovnici:
\( \left|x^{2}+2 x-1\right|=3 \)
\( K=\{-1 \pm \sqrt{3}\} \)
\( K=\{-1 \pm \sqrt{5}\} \)
\( K=\{1 \pm \sqrt{5}\} \)
\( K=\{-2 \pm \sqrt{5}\} \)
