Question

решите уравнение 35y2+2y-1=0

Answer 1

Ответ:

1/7;1/5

Пошаговое объяснение:

Answer 2

$35y {}^{2} + 2y - 1 = 0 \\ d = b {}^{2} - 4ac = 2 \times 2 + 4 \times 35 = 4 + 140 = 144 \\ \sqrt{144} = 12 \\ x1 = \frac{ - 2 - 12}{35 \times 2} = \frac{ - 14}{70} = - \frac{1}{5} \\ x2 = \frac{ - 2 + 12}{70} = \frac{10}{70} = \frac{1}{7}$