Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.4 Evaluation Logarithms and the Change-of-Base Theorem - 4.4 Exercises - Page 456: 27

$\approx 3.9494$ ; Both the equations are same.

Apply logarithmic property : $\log m+ \log n=\log (mn)$ We will write the equation in the form of the logarithmic expression and evaluate the result. $\log 387+ \log 23=\log (387 \times 23) \approx 3.9494$ Thus , both the equations are same.