Řeš graficky rovnice:
\large x^{2}-4 = 0
\large K = \left \{ { \pm 2} \right \}
\large K = \left \{ { 0, 4} \right \}
\large K = \left \{ { 2, -4} \right \}
\large K = \left \{ { \pm 4} \right \}