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Rovnica 2x²+x-1=0
Rieš v \( \R \) rovnicu pomocou vzorca:
\( \normalsize2x^2+x-1=0 \)
\( \large K=\left\{{-2;\frac12}\right\} \)
\( \large K=\left\{{-1;\frac12}\right\} \)
\( \large K=\left\{{-1;\frac13}\right\} \)
\( \large K=\left\{{0;\frac12}\right\} \)