Find the inverse of the matrix ` A=[[8,4,2],[2,9,4],[1,2,8]]` .

Explanation

To find the inverse of the matrix \( A = \begin{bmatrix} 8 & 4 & 2 \\ 2 & 9 & 4 \\ 1 & 2 & 8 \end{bmatrix} \), we will follow these steps:

### Step 1: Calculate the Determinant of Matrix A

The determinant of a 3x3 matrix \( A = \begin{bmatrix} a & b & c \\ d & e & f \\ g & h & i \end{bmatrix} \) is given by the formula:

\[
\text{det}(A) = a(ei - fh) - b(di - fg) + c(dh - eg)
...