3log 8. 2log 9 + 3log 243

³log 8 . ²log 9 + ³log 243
= ³log 2³. ²log 3² + ³log [tex] 3^{5} [/tex]
= 3 . 2 .³log 2 . ²log 3 + 5 . ³log 3
= 3 . 2 . 1 + 5 . 1
= 6 + 5
= 11