Question

только №2 пожалуйста

Answer 1

6x² - 20x - 5x - 25 = 0
6x² - 25x - 25 = 0
D = b² - 4ac = 625 - 4 × 6 × ( - 25) = 625 + 600 = 1225= 35²
x1 = ( 25 + 35) / 12=  5
x2 = ( 25 - 35) / 12 = - 10/12 = - 5/6
Ответ: x1 = 5, x2 = - 5/6.