Compute AB, If Possible $A = \left[ \begin{array} { r r } - 1 & 3 \\ 2 & 2 \end{array} \right]$

Compute AB, if possible.
- $A = \left[ \begin{array} { r r } - 1 & 3 \\ 2 & 2 \end{array} \right]$ and $B = \left[ \begin{array} { l l } - 2 & 0 \\ - 1 & 2 \end{array} \right]$

A) $\left[ \begin{array} { r r } 2 & - 6 \\ - 1 & 1 \end{array} \right]$
B) $\left[ \begin{array} { r r } 2 & 0 \\ - 2 & 4 \end{array} \right]$
C) $\left[ \begin{array} { l l } 6 & - 1 \\ 4 & - 6 \end{array} \right]$
D) $\left[ \begin{array} { l l } - 1 & 6 \\ - 6 & 4 \end{array} \right]$

Correct Answer:

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