Rezolvare:
a)
[tex] {x}^{2} - 5x + 6 = 0 \\ a = 1 \\ b = 5 \\ c = 6 \\ delta = {b}^{2} - 4ac = {5}^{2} - 4 \times 1 \times 6 = 25 - 24 = 1[/tex]
