Question 174792
Write as a single log and simplify it: 
Log_4 (square root 40) + log_4 (square root 48) – log_4 (square 15)
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Did you mean sqrt(15) in the last term?
{{{log(4,sqrt(40)) + log(4,sqrt(48)) - log(4,sqrt(15))}}} like that?
Since the logs all have the same base (4):
={{{log(4,sqrt(40)*sqrt(48)/sqrt(15))}}}
={{{log(4,sqrt(128))}}}
= 3.5