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[" Let "8" and "C" be two square matrices "],[" such that "BC=CB" and "C^(2)=0" .If "A=],[B+C" then "A^(3)-B^(3)-3B^(2)C" is "],[" (1) "3B],[" (2) "0],[" (3) "B+C],[" (4) "B-C]

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