Question: Let a = [1, -3, 5], b = [4, 0, 8], c = [-2, 9, 1]. Find: |a + c| 2 + |a - c|

Let a = [1, -3, 5], b = [4, 0, 8], c = [-2, 9, 1].
Find:

|a + c|2 + |a - c|2 - 2(|a|2 + |c|2)

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