Предмет: Алгебра, автор: Deepspace77

Решите уравнение:
log0,4 (x²+x+4)= log0,4x

MizoriesKun: проверь знаки в условии
irishkax1: Проверь условие. В данном виде уравнение не имеет решения
MizoriesKun: скорее всего минус 4
Deepspace77: Да точно
Deepspace77: Сейчас
MizoriesKun: если кто то пишет решение уже не исправить
Deepspace77: log 0,4 (x²+x-4) = log 0,4x

Ответы

Автор ответа: MizoriesKun
1
log0,4 (x²+x-4)= log0,4x
ОДЗ х>0

так как основания  лог.-мов одинаковы

  x²+x-4 = x
  x²=4
х=2 и х=-2 не подходит под ОДЗ

Ответ:х= 2
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