Question 498524
exact value of log4 120 − log4 48 − log4 40
**
log4 120 − log4 48 − log4 40
log4 120 -(log 4 48 + log4 40)
place under a single log
log4[120/48*40]
log4[1/16]=log4[1/4^2]=4^-2
Definition: base(4) raised to log of number(x)=number(4^-2) 
4^x=4^-2
x=-2