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Verified answer
Bab LogaritmaMatematika SMA Kelas X
⁹log 25 . ⁵log 2 - ³log 18 = ^(3²)log 5² . ⁵log 2 - ³log 18
= (2/2) . ³log 5 . ⁵log 2 - ³log 18
= 1 . ³log 2 - ³log 18
= ³log (2/18)
= ³log (1/9)
= ³log 3⁻²
= -2 . ³log 3
= -2