5long 9 + 5long 2 - 5long 450

5 log 9 + 5 log 2 - 5 log 450
= 5 log (9×2/450)
= 5 log 1/15
= -1 (5 log 15)
= -1 (5 log 5 + 5 log 3)
= - ( 1 + 5 log 3)

Kelas 10 Matematika
Bab Logaritma

^ = pangkat

^5log 9 + ^5log 2 - ^5log 450
= ^5log (9 . 2/450)
= ^5log 25
= ^5log 5²
= 2 . ^5log 5
= 2