A) \[\left[ \begin{matrix} 11 & -7 \\ 5 & 10 \\ \end{matrix} \right]\]
B) \[\left[ \begin{matrix} -1 & \text{ }1 \\ -1 & -2 \\ \end{matrix} \right]\]
C) \[\left[ \begin{matrix} 11 & 7 \\ 5 & -10 \\ \end{matrix} \right]\]
D) \[\left[ \begin{matrix} 12 & -7 \\ 5 & -10 \\ \end{matrix} \right]\]
Correct Answer: B
Solution :
\[A=\left[ \begin{matrix} 5 & -3 \\ 2 & 4 \\ \end{matrix} \right]\]and \[B=\left[ \begin{matrix} 6 & -4 \\ 3 & 6 \\ \end{matrix} \right]\], \ \[A-B=\left[ \begin{matrix} -1 & \,\,\,1 \\ -1 & -2 \\ \end{matrix} \right]\].
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