A quick trick for computing eigenvalues | Chapter 15, Essence of linear algebra

How to write the eigenvalues of a 2x2 matrix just by looking at it. Need a refresher on eigenvalues? Thanks to Tim for the jingle: Help fund future projects: ​ An equally valuable form of support is to simply share the videos. Special thanks to these supporters: Lockdown math lecture talking about the mean product formula: Timestamps: 0:00 - Background 4:53 - Examples 10:24 - Relation to the characteristic polynomial 12:00 - Last thoughts ------------------ These animations are largely made using a custom python library, manim. See the FAQ comments here: #manim You can find code for specific videos and projects here: Music