Question

2. Решите  уравнение          10х2 - х - 60 = 0   

Answer 1

10x^2 - x - 60 = 0;

D = (-1)^2 - 4*(10)*(-60) = 2401 = 49^2

x1 = (1 - 49)/20 = -48/20 = -2,4

x2 = (1 + 49)/20 = 50/20 = 2,5

 

Ответ: x = -2,4; 2,5