Řeš v ℝ rovnice:
\large \left( x-6\right) \left( x + 2\right) = 0
\large K = \left \{ { 2;6} \right \}
\large K = \left \{ { - 6;2} \right \}
\large K = \left \{ { - 2;-6} \right \}
\large K = \left \{ { - 2;6} \right \}