Question

245x°-120x – 125 = 0​

Answer 1

Ответ:

$x1 = 1 \\ x2 = - \frac{25}{49}$

Пошаговое объяснение:

$245 {x}^{2} - 120x - 125 = 0| \div 5 \\ 49 {x}^{2} - 24x - 25 = 0 \\ d = 576 + 4900 = 5476 \\ x1 = \frac{24 + 74}{98} = 1 \\ x2 = \frac{24 - 74}{98} = - \frac{25}{49}$

Answer 2

Ответ:

Пошаговое объяснение:

49x² - 24x - 25 = 0

D = 576 + 4900 = 5476 = 74²

x1 = (24 - 74)/98 = -50/98 = -25/49

x2 = (24 + 74)/98 = 1