Final answer:
The value of log2 16 - log2 4 simplifies to the logarithm of 16 divided by 4, which is log2 4. Knowing that 2 squared is 4, the answer is 2.
Step-by-step explanation:
The value of the logarithmic expression log2 16 - log2 4 can be simplified by using the properties of logarithms. Specifically, we can use the property that states the logarithm of a quotient is equal to the difference of the logarithms (loga(b/c) = logab - logac). Therefore, we can rewrite the expression as log2(16/4). Since 16/4 equals 4, and 22 equals 4, the expression simplifies to 2.