# Lesson 09: Change of Base Formula

Lesson on changing the base of the logarithmic equation to solve the problem. In order to change the base in logarithm, keep in mind that logm to the base n is equal to logm/logn. Using this formula, evaluating and solving logarithmic equations will be easier.

3:52 log15 to the base 3

7:38 log 23 to the base 2

Numberbender lesson module: http://www.numberbender.com/lesson/mo...

====================

For more math video updates, subscribe here!

https://www.youtube.com/user/TheNumbe...

Follow us on Twitter https://twitter.com/number_bender

Like us on Facebook https://www.facebook.com/thenumberbender

=====================

Thank you for watching!