2log (x^2-x-1) = 5log (x^2-x-1) tolong sama caranya ya..

Bab Logaritma
Matematika SMA Kelas X

²log (x² - x - 1) = ⁵log (x² - x - 1)

x² - x - 1 = 1
x² - x - 1 - 1 = 0
x² - x - 2 = 0
(x - 2) (x + 1) = 0
x - 2 = 0
x = 2

x + 1 = 0
x = -1