# Inverse of 3 by 3 Matrix Using Gauss-Jordan on Video

In this video, the Matrix Inverse of a 3 by 3 matrix is found using Gauss-Jordan method based on elementary row operations is presented.
Question: Find the inverse of the 3 by 3 matrix is given by $\begin{bmatrix} -1 & 2 & 1 \\ 0 & 1 & 1 \\ 1 & -1 & -1 \end{bmatrix}$