log₉ 27+log₉ 3=log₉ 27*3=log₉ 81=2, bo 9²=81log₆ 72 -log₆ 2=log₆ 72/2=log₆ 36=2, bo 6²=36
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log₉ 27+log₉ 3= log₉(27×3)=log₉81=2
log₆ 72 -log₆ 2 =log₆(72÷2)=log₆36=2
log₉ 27+log₉ 3=
log₉ 27*3=log₉ 81=2, bo 9²=81
log₆ 72 -log₆ 2=
log₆ 72/2=log₆ 36=2, bo 6²=36