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Kelas 10 Matematika
Bab Logaritma

^ = pangkat

^3log x = a

^3log² x - 3 . ^3log x + 2 = ^3log 1
a² - 3a + 2 = 0
(a - 2) (a - 1) = 0
a - 2 = 0
a = 2

a - 1 = 0
a = 1

^3log x = 2
x = 3^2
x = 9

^3log x = 1
x = 3^1
x = 3

Syarat:
x > 0

x1 + x2 = 3 + 9
x1 + x2 = 12