Akar 6log 9× 3log 36- 49log1/7

6log3^2 × 3 log 6^2 - 7^2 log 7^-1
= 2 × 2 × 6 log 3 × 3 log 6 - (-1/2) × 7 log 7
= (4 × 1)-( (1/2 )×1)
= 9/2