If `A=[{:(4,5),(8,9):}]`, then find adjA.

Explanation

To find the adjoint of the matrix \( A = \begin{pmatrix} 4 & 5 \\ 8 & 9 \end{pmatrix} \), we will follow these steps:

### Step 1: Find the Cofactors
The adjoint of a matrix is the transpose of the matrix of cofactors. We will first find the cofactors of each element in the matrix \( A \).

1. **Cofactor \( A_{11} \)**:
\[
A_{11} = (-1)^{1+1} M_{11} = 1 \cdot M_{11}
...