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

- Finding the minor of each element of matrix
**A** - Finding the cofactor of matrix
**A**

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

where I use the example

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

Matrices - Minors of elements in a 3x3 matrix | ExamSolutions - maths problems answered - youtube Video

## Finding the cofactor of a 3×3 matrix

Matrices - Finding the cofactor matrix | ExamSolutions - maths problems answered - youtube Video

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

Matrices - Inverse of a 3x3 matrix | ExamSolutions - maths problems answered - youtube Video

## Example to try

Matrices - Working with Inverse Matrices (Example) | ExamSolutions - maths problems answered - youtube Video

Inverse Matrices on a Casio ClassWiz Calculator | ExamSolutions - maths problems answered - youtube Video