Question

Evaluate the minor and cofactor using the matrix A . A= 1 2 -3 4 -5 6 7 8 -9

Answer 1

Hi,

Explanation:

`A=\begin{bmatrix}1 &2&-3 \\4 & -5&6\\7&8&-9 \end{bmatrix}\\\\\\Minor\ A=\begin{bmatrix}-3 &-78&67 \\6 &-30&-52\\-3&18&-13 \end{bmatrix}\\\\\\CoFactor\ A=\begin{bmatrix}-3 &78&67 \\-6 &-30&52\\-3&-18&-13 \end{bmatrix}\\`