Problem

Problem

If A=[2−2−4−1341−2−3]A = \begin{bmatrix} 2 & -2 & -4 \\ -1 & 3 & 4 \\ 1 & -2 & -3 \end{bmatrix} then AA is : (a) idempotent matrix (b) nil-potent matrix of order '2' (c) involutary matrix (d) nil-potent matrix of order '3'

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