х^2 - х - 6 = 0
D = 1^2 -4•(-6) = 1 + 24 = 25
√D = √25 = 5
х1 = (1+5)/2 = 6/2 = 3
х2 = (1-5)/2 = -4/2 = -2
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х^2 - х - 6 = 0
D = 1^2 -4•(-6) = 1 + 24 = 25
√D = √25 = 5
х1 = (1+5)/2 = 6/2 = 3
х2 = (1-5)/2 = -4/2 = -2