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Posted

But that means a/i equals ai and -ai

How do you figure that? If a/i = ai and you multiply both sides by i you get a = -a. Surely you don't believe that every number is equal to its negative.

Posted

How do you figure that? If a/i = ai and you multiply both sides by i you get a = -a. Surely you don't believe that every number is equal to its negative.

It's because of the ambiguity of square roots.

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