Solve the Problem $A = \left[ \begin{array} { r r } 3 & - 2 \\ - 4 & 4 \end{array} \right]$

Multiple Choice

Solve the problem.
-Given $A = \left[ \begin{array} { r r } 3 & - 2 \\ - 4 & 4 \end{array} \right]$ , find $A ^ { 2 }$ .

A)
$\left[ \begin{array} { r r } 1 & 2 \\ 4 & - 8 \end{array} \right]$
B)
$\left[ \begin{array} { r r } 17 & - 14 \\ - 28 & 24 \end{array} \right]$
C)
$\left[ \begin{array} { r r } 9 & 4 \\ 16 & 16 \end{array} \right]$
D)
$\left[ \begin{array} { r r } 13 & - 20 \\ 32 & - 4 \end{array} \right]$