Question

Найти корни уровнений

Answer 1

$7x^2+6x-1=0 \\ a-b+c=0 \\ x=-1 \\ x= \frac{1}{7}$

Answer 2

D=36+28=64
$x1 = \frac{ - 6 + 8}{14} = \frac{2}{14} = \frac{1}{7}$
$x2 = \frac{ - 6 - 8}{14} = \frac{ - 14}{14} = - 1$