Q.If $A = \begin{pmatrix} 1 & 2 \ 3 & 4 \end{pmatrix}$ and $B = \begin{pmatrix} 5 & 6 \ 7 & 8 \end{pmatrix}$ , then $(A + B)(\text{adj } A + \text{adj } B)$ equals

10 I

12 I

14 I

16 I

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.If A=(12 34)A = \begin{pmatrix} 1 & 2 \ 3 & 4 \end{pmatrix}A=(1​2 3​4​) and B=(56 78)B = \begin{pmatrix} 5 & 6 \ 7 & 8 \end{pmatrix}B=(5​6 7​8​), then (A+B)(adj A+adj B)(A + B)(\text{adj } A + \text{adj } B)(A+B)(adj A+adj B) equals