If \[{{A}^{-1}}=\left[ \begin{matrix} 1 & -2 \\ -2 & 2 \\ \end{matrix} \right],\] what is det(A)?

If \[{{A}^{-1}}=\left[ \begin{matrix} 1 & -2 \\ -2 & 2 \

1.	If \[{{A}^{-1}}=\left[ \begin{matrix} 1 & -2 \\ -2 & 2 \\ \end{matrix} \right],\] what is det(A)?
A.	\[2\]
B.	\[-2\]
C.	\[\frac{1}{2}\]
D.	\[-\frac{1}{2}\]
Answer» E.

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If \[{{A}^{-1}}=\left[ \begin{matrix} 1 & -2 \\ -2 & 2 \\ \end{matrix} \right],\] what is det(A)?

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