1. $A=\left[\begin{array}{cc}8& -5\\ -6& 4\end{array}\right]$

• A. $\left[\begin{array}{cc}2& \frac{5}{2}\\ 3& 4\end{array}\right]$
• B. $\left[\begin{array}{cc}2& \frac{5}{2}\\ 3& 4\end{array}\right]$
• C. $\left[\begin{array}{cc}2& \frac{5}{2}\\ 3& 4\end{array}\right]$
• D. $\left[\begin{array}{cc}2& \frac{5}{2}\\ 3& 4\end{array}\right]$

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