Rieš v \( \R \) rovnicu:
\( \normalsize\sqrt{4+2x-{x^2}}=x-2 \)
\( \normalsize K=\left\{4\right\} \)
\( \normalsize K=\left\{2\right\} \)
\( \normalsize K=\left\{3\right\} \)
\( \normalsize K=\left\{1\right\} \)