Use Gauss-Jordan elimination and the inversion algorithm to find the inverse of the given matrix A if the matrix is invertible. Don't forget to finish by identifying and boxing the inverse matrix : \begin{bmatrix} 1 & -5 & 10 \\ 0 & 0 & 5 \\ 0 & -2 & 1 \end{bmatrix}
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We start by dividing the first row by -5: $$ \left[\begin{array}{cc|cc} 1 & -2 & -\frac{1}{5} & 0 \\ -2 & 4 & 0 & 1 \end{array}\right] $$ Show more…
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