ini apa yah isinya???

(3log25 . 5log81 - 4log2) / (3log36 - 3log4)
= (3log5² . 5log81 - 2²log2) / (3log(36/4))
= (2 . 3log5 . 5log81 - ½ . 2log2) / (3log9)
= (2 . 3log81 - ½) / 2
= (2 . 4 - ½) / 2
= (8 - ½) / 2
= 7½ / 2
= 15/2 / 2
= 15/4

Jawabannya 15/4 caranya terlampir di foto