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Riešenie kvadratickej rovnice
Rieš v \( \mathbb{R} \) rovnicu a urob skúšku:
\( x^{2}+2\left(\frac{6}{4}: \frac{42}{98}\right) x+\sqrt{9}+4=0 \)
\( K=\left\{\frac{-7 \pm \sqrt{19}}{2}\right\} \)
\( K=\left\{\frac{-7 \pm \sqrt{25}}{2}\right\} \)
\( K=\left\{\frac{-5 \pm \sqrt{21}}{2}\right\} \)
\( K=\left\{\frac{-7 \pm \sqrt{21}}{2}\right\} \)