Question

I. Resolva em R a equação 3x² -×-2=0​

Answer 1

$3x^{2} - x - 2 = 0 \\ delta = {b}^{2} - 4ac \: \: \: \: \: \: \: \: \: ( - 1)^{2} - 4 \times 3 \times ( - 2) = 25 \\ \\ x1 = \frac{ - b + \sqrt{25} }{2a} \: \: \: \: \: \frac{1 + 5}{6} = 6 \\ x2 = \frac{ - b - \sqrt{25} }{2a} \: \: \: \: \: \frac{1 - 5}{6} = \frac{4}{6} = \frac{2}{3}$