Řeš v \mathbb{C} rovnici:
\large x^4-5x^2-36=0
\large K = \left \{-2\text{i};2\text{i};-3;3\right \}
\large K = \left \{-2\text{i};2\text{i};-4;4\right \}
\large K = \left \{-3\text{i};3\text{i};-3;3\right \}
\large K = \left \{-2\text{i};2\text{i};-5;5\right \}
