( 3 log x ) pangkat 2 - 12 3 log akar x + 8 = 0

jawab

(³log x)²  -12 . ³log x^(1/2)  + 8 = 0
(³log x)² - 12 (1/2) (³log x) + 8 = 0
(³log x)² - 6 (³log x) + 8  = 0
misal a= ³log x  → x = 3ᵃ

a²  - 6a + 8 = 0
(a - 4)(a - 2)= 0
a = 4  → x= 3⁴ = 81
a = 2  → x= 3² = 9