nilai 2log 18 - 2log 8akar2 +2log 1/27 - 2log 1/3

²log(2.3²) - ²log(2³.2^(1/2)) + ²log3^-3 - ²log3^-1
= ²log2 + 2.²log3 - (3.²log2 + (1/2).²log2) - 3.²log3 + ²log3
= 1 + 2.²log3 - (3 + 1/2) - 2.²log3
= 1 - (3 + 1/2)
= -5/2