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Misal ²log x = u (²log 1 = 0)
u² - 3u - 10 = 0
(u - 5)(u + 2) = 0
u = 5 atau u = -2
²log x = 5 ²log x = -2
x1 = 2^5 x2 = 2^(-2)
x1 = 32 x2 = 1/4
Nilai x1 x2 = 32 x 1/4 = 8