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If A + B = \(\left[\begin{array}{cc}1 & 2 \\ 5 & −6\end{array}\right]\) and A − B = \(\left[\begin{array}{cc}−3 & 4 \\ −1 & −2\end{array}\right]\), then AB =
1
\(\left[\begin{array}{cc}−7 & −5 \\ −8 & 6\end{array}\right]\)
2
\(\left[\begin{array}{cc}7 & −5 \\ −8 & 6\end{array}\right]\)
3
\(\left[\begin{array}{cc}7 & 5 \\ −8 & −6\end{array}\right]\)
4
\(\left[\begin{array}{cc}−7 & 5 \\ 8 & −6\end{array}\right]\)