Question

log 0.4 16 - 2 log 0.4 10

Answer 1

log0.4 (16) - log 0.4 (10^2) = 
= log 0.4 (16/100) = 
= log 0.4 (0,16) = 
= log 0.4 (0.4^2) = 
= 2 log 0.4 (0.4) = 2*1 = 2