This document introduces using logs to solve exponential equations. It explains that logs cannot rewrite exponents with different bases and instead taking the log of both sides allows solving for the variable. It provides steps to take logs of both sides, expand them, and then solve for the variable to find the answer.

1. Intro to Using Logs
We'll use log = log button on calculator, called 'common log'
Can't rewrite as same base
Instead, we can take or apply logs to both sides and solve
= log15
Solve for x
Solve Exponential Equations
Can NEVER rewrite as a power of 4
Can only solve by taking logs of both sides
2) Expand the logs
3) Solve for x