MCQ
$A =\left[\begin{array}{cc}1 & -1 \\ -1 & 1\end{array}\right] \Rightarrow A^2=$
  • $2 A$
  • B
    A
  • C
    $\frac{1}{2} A$
  • D
    4A

Answer

Correct option: A.
$2 A$
(A)

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