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linear algebra: please explain your reasoning 5. The matrix A = (1 - 1) has the property that A2 = 0. Is it possible for

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5. The matrix A = (1 - 1) has the property that A2 = 0. Is it possible for a nonzero symmetric 2 x 2 matrix to have this property? Prove your answer. nointive law of multiplication for 2 x

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