Find A2 (Note: A2 = AA $A = \left[ \begin{array} { c } - 5 \\8\end{array} \right]$

Multiple Choice

Find A2. (Note: A2 = AA.) $A = \left[ \begin{array} { c } - 5 \\8\end{array} \right]$

A) $\left[ \begin{array} { l } 25 \\64\end{array} \right]$
B) $\left[ \begin{array} { l } - 40 \\- 40\end{array} \right]$
C) $\left[ \begin{array} { l l } 25 & 64\end{array} \right]$
D) $\left[ \begin{array} { l l } - 40 & - 40\end{array} \right]$
E) not possible