[tex]3 {x}^{2} - x - 2 = 0 \\ \frac{9 {x}^{2} - 1(3x) - 6 }{3} = 0\\ \\ (3x - 3)(3x + 2) = 0\\ \\ (x - 1)(3x + 2) = 0 \\ \\ (x - 1) = 0 \: \: \: \: \: \: o \: \: \: \: (3x + 2) = 0 \\ x = 1 \: \: \: \: \: o \: \: \: \: x = - \frac{2}{3} \\ \\ \\ [/tex]
