Řeš v \( \R \) rovnici:
\( \large \sqrt {7-2\sqrt x } = \sqrt {18-13\sqrt x } \)
\( \large K = \left \{ 2 \right \} \)
\( \large K = \left \{ -1 \right \} \)
\( \large K = \left \{ 1 \right \} \)
\( \large K = \left \{ 0 \right \} \)