3log(x2-9x+19)=3log5

Materi : Persamaan Logaritma
Kelas : X SMA

^3 log(x^2 - 9x + 19) = ^3 log5
x^2 - 9x + 19 = 5
x^2 - 9x + 19 - 5 = 0
x^2 - 9x + 14 = 0
(x - 7) (x - 2) = 0
x = 7
x = 2

Hp = { 2 , 7 }

Bab Logaritma
Matematika SMA Kelas X

³log (x² - 9x + 19) = ³log 5
x² - 9x + 19 = 5
x² - 9x + 19 - 5 = 0
x² - 2x - 7x + 14 = 0
x (x - 2) - 7 (x - 2) = 0
(x - 7) (x - 2) = 0
x - 7 = 0    atau     x - 2 = 0
x = 7                     x = 2