Finding the inverse of a 3×3 matrix where it exists

To find the inverse of a 3×3 matrix A say, (Last video) you will need to be familiar with several new matrix methods first

1. Finding the minor of each element of matrix A
2. Finding the cofactor of matrix A

With these I show you how to find the inverse of a matrix A

Prerequisite: Finding minors of elements in a 3×3 matrix

Finding the cofactor of a 3×3 matrix

Putting it all together – Finding the inverse of a 3×3 matrix

Examples to try