Lg(6x + 1) + lg (-x - 1) = 0
lg(6x + 1) + lg (-x - 1) = lg (1)
(6x + 1)*(- x - 1) = 1
- 6x^2 - 7x - 2 = 0
6x^2 + 7x + 2 = 0
D = 49 - 48 = 1
x1 = ( - 7 + 1)/12 = - 6/12 = - 1/2 = - 0,5
x2 = ( - 7 - 1)/12 = - 8/12 = - 4/6 = - 2/3
ОДЗ
нет решений!
Ответ
нет решений