Question

Решите уравнение (х-2)(3x+1)=0

Answer 1

$3 {x}^{2} + x - 6x - 2 = 0 \\ 3 {x}^{2} - 5x - 2 = 0$
D
$25 + 4 \times 2 \times 3 = 25 + 24 = {7}^{2}$
$x1 = (5 - 7) \div 6 = - 1 \div 3 \\ x2 = 12 \div 6 = 2$
ответ:
$- 1 \div 3 \\ 2$