nikai dari 2log5.5log2-2log4

2log5.5log2 = 2log2 = 1
2log4 =2log2^2= 2

Maka, 1-2= -1

[tex] {}^{2} log5 \times {}^{5} log2 - {}^{2} log4 = {}^{2} log2 - {}^{2} log {2}^{2} = 1 - 2 = - 1[/tex]