Question

Решите пример с дексриминатом. 17s^2-19s+2=0

Answer 1

$d = {b}^{2} - 4 \times a \times c \\ d = {19}^{2} - 136 = 361 - 136 = 225 \\ x1 = \frac{ - b + \sqrt{d} }{2 \times a} = \frac{19 + 15}{34} = \frac{34}{34} = 1 \\ x2 = \frac{ - b - \sqrt{d} }{2 \times a} = \frac{19 - 15}{34} = \frac{4}{34} = \frac{2}{17}$