Question

If the cofactor matrix is

7 15 9

6 74

10 2 7

−

 

 

−

 

 

−

 

, then the Adjoint matrix is

Answer 1

The adjoint matrix is the transpose of the cofactor matrix.

$$\begin{bmatrix} 7 & 15 & 9 \\ 6 & 7 & 4 \\ 10 & 2 & 7 \end{bmatrix}^T=\begin{bmatrix} 7 & 6 & 10 \\ 15 & 7 & 2 \\ 9 & 4 & 7 \end{bmatrix}$$

Answer

$$\begin{bmatrix} 7 & 6 & 10 \\ 15 & 7 & 2 \\ 9 & 4 & 7 \end{bmatrix}$$