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

Published: 07 May 2021
on channel: 3Blue1Brown
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How to write the eigenvalues of a 2x2 matrix just by looking at it.
Need a refresher on eigenvalues?    • Eigenvectors and eigenvalues | Chapte...  
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Lockdown math lecture talking about the mean product formula:
   • The simpler quadratic formula | Ep. 1...  

Timestamps:
0:00 - Background
4:53 - Examples
10:24 - Relation to the characteristic polynomial
12:00 - Last thoughts

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