Question

НАЙДИТЕ КОРНИ УРАВНЕНИЯ (2,5y-4)(6y+1,8)=0

Answer 1

 (2,5y-4)(6y+1,8)=0

15y² +4,5y - 24y - 7.2 = 0

15y² -19,5y - 7.2 = 0

D = 380.25 + 432=812.25

x1=(19.5+28.5) / 15 =3.2

x2=(19.5-28.5) / 15 = -0.6

Ответ 3.2 , -0.6