Inversion by Determinants Let A be a square matrix and let à be its cofactor matrix, the m...

Inversion by Determinants Let A be a square matrix and let à be its cofactor matrix, the matrix obtained from A by replacing each of its elements by its cofactor. Then if |A| ≠ 0,

Use this formula to compute the inverse of the matrix

Check your result by computing the inverse using row reduction.