Rieš v \( \R \) rovnicu:
\( \normalsize\sqrt{15-x}+\sqrt{3-x}=6 \)
\( \normalsize K=\left\{{-2}\right\} \)
\( \normalsize K=\left\{{-1}\right\} \)
\( \normalsize K=\left\{{0}\right\} \)
\( \normalsize K=\left\{{1}\right\} \)