himpunan penyelesaian dari log (x +7) + log (x + 6) - log (x + 10) = 0 adalah

Materi : Persamaan Logaritma

Pembahasan :
Log (x + 7) + Log (x + 6) - Log (x + 10) = 0
Log (x + 7) + Log (x + 6) = Log (x + 10)
Log (x + 7)(x + 6) = Log (x + 10)
(x + 7)(x + 6) = (x + 10)
x² + 13x + 42 = x + 10
x² + 12x + 32 = 0
(x + 4)(x + 8) = 0
x = -4
x = -8

Hp : {-8 , -4}