Inverse of a 3x3 Matrix

For best viewing experience or if the video is not available on Xirius, you can copy the link and watch it directly on YouTube by clicking the "Copy Video Link" button above.
Matrices
This precalculus video tutorial explains how to find the inverse of a 3x3 matrix. You need to write an augmented matrix containing the original matrix and the multiplicative identity matrix. You need to convert the original matrix into the multiplicative identity matrix using elementary row operations. The multiplicative identity matrix will change into the inverse of the original matrix as long as you apply the same elementary row operations to it.