List of top Mathematics Questions on types of matrices asked in MET

If \( A = \begin{bmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ a & b & -1 \end{bmatrix} \), then \( A^2 \) is equal to

Pick out the wrong statement. If \(A\) and \(B\) are square matrices of the same order, then
If $A$ and $B$ are square matrices of the same order, then $(A+B)(A-B)$ is equal to: