4log(x²-x-11)= 5log(x²-x-11)

Bab Logaritma
Matematika SMA Kelas X

^ = pangkat

^4log (x² - x - 11) = ^5log (x² - x - 11)
x² - x - 11 = 1
x² - x - 11 - 1 = 0
x² - x - 12 = 0
(x - 4) (x + 3) = 0
x - 4 = 0
x = 4

x + 3 = 0
x = -3