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For A = [[2, -1], [1, 0]], the expression A squared - 2A + I equals:
Athe zero matrix
Bthe matrix -I
Cthe matrix I
Dthe matrix A
Answer & Solution
Correct answer: A. the zero matrix
A squared is [[3, -2], [2, -1]] and 2A is [[4, -2], [2, 0]], so the result is zero.
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