Find `A^(-1)` if `A=|(0,1,1),(1,0,1),(1,1,0)|` and show that `A^(-1)=(A^(2)-3I)/2`

Explanation

To find the inverse of the matrix \( A \) given by

\[
A = \begin{pmatrix}
0 & 1 & 1 \\
1 & 0 & 1 \\
1 & 1 & 0
\end{pmatrix}
...