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If A=[(1,-3,2),(2,1,-3),(4,-3,-1)], B=[(...

If `A=[(1,-3,2),(2,1,-3),(4,-3,-1)], B=[(1,4,1,0),(2,1,1,1),(1,-2,1,2)]and C=[(2,1,-1,-2),(3,-2,-1,-1),(2,-5,-1,0)]`, show that `AB=AC`.

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