engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Matrices Operations on Matrices
If \(\rm A=\begin{bmatrix}i&0\\\ 0&i\end{bmatrix}\) and \(\rm B=\begin{bmatrix}0&-i\\\ -i&0\end{bmatrix}\) then (A + B) (A – B) is
1
A2 - B2
2
A2 + B2
3
A2 - B2 + BA + AB
4
None of these