Question

Квадратные уравнение Теорема виета
3x^2+7x+2=0

Answer 1

$3 {x}^{2} + 7x + 2 = 0 \\ d = {b}^{2} - 4ac = {7}^{2} - 4 \times 3 \times 2 =49 -24 = 25 = {5}^{2} \\ x1 = \frac{ - b + - \sqrt{d} }{2 \times a} = \frac{ - 7 + 5}{2 \times 3} = \frac{ - 2}{6} = - \frac {1}{3} \\ x2 = \frac{ - 7 - 5}{2 \times 3} = \frac{ - 12}{6} = - 2$