If I equals the square root of negative one... ...then I squared equals negative one. Okay? In other words, if you consider I as a constant... ...you can then define the square roots of all the negative numbers.

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Superbad (2007)

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Duration: 16s

If I equals the square root of negative one... ...then I squared equals negative one. Okay? In other words, if you consider I as a constant... ...you can then define the square roots of all the negative numbers.