Řeš v ℝ rovnice pomocí rozkladu na součin:
\large x^{2}-5 x + 6 = 0
K = \left\{ {0;\ \left. 6 \right\}} \right.
K = \left\{ {2;\ \left. 3 \right\}} \right.
K = \left\{ {1;\ \left. 4 \right\}} \right.
K = \left\{ {-1;\ \left. 5 \right\}} \right.