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³log x - 2 = 8. ^xlog 3³log x - 2 = 8.(1/³log x)
misalkan ³log x = p
p - 2 = 8(1/p)
kalikan dengan p
p² - 2p = 8
p² - 2p - 8 = 0
x1 + x2 = -b/a
³log x1 + ³log x2 = -(-2)/1
³log (x1.x2) = 2
x1.x2 = 3²
x1.x2 = 9
18(x1.x2) = 18(9) = 162