How to find the determinant of a 3 by 3 matrix (3 ways) linear algebra tutorial

Learn how to find the determinant of a 3 by 3 matrix for your linear algebra class! 0:00 cofactor expansion 3:00 the shortcut! *only for 3 by 3 matrices* 5:15 The proof for the shortcut 9:30 use the properties of the determinant 🛍 Shop my math t-shirt & hoodies: https://amzn.to/3qBeuw6