Question

Solve this question without a calculator:
log4 20 − log4 45 + log4 144

Answer 1

answer will be 3 i think
do like this
first apply loga - logb=log(a/b) to log4 20 and log4 45
then apply loga + logb=log(ab) to the remaining two terms you should get your answer

Answer 2

It can be rewritten like this \[\log _{4}[\frac{ 20*144 }{ 45 }]\]
And that will result to \[\log _{4}64\]
which is equal to 3