Question

Уравнение:
2х²+3х-2=0

Answer 1

Ответ:

$2 {x}^{2} + 3x - 2 = 0 \\ d = {3}^{2} - 4 \times 2 \times ( - 2) = 25 \\ x = \frac{ - 3 + \sqrt{25} }{2 \times 2} = \frac{ - 3 + 5}{4} = \frac{1}{2} \\ x = \frac{ - 3 - 5}{4} = - 2$