Rieš graficky rovnicu:
\( \normalsize x^2-4=0 \)
\( \normalsize K=\left\{{\pm2}\right\} \)
\( \normalsize K=\left\{{\pm3}\right\} \)
\( \normalsize K=\left\{{2}\right\} \)
\( \normalsize K=\left\{{0, \pm2}\right\} \)
