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OpenStudy (anonymous):
\[\sqrt{-4} = 2i\] How is this? i = \(\sqrt{-1}\)
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OpenStudy (bibby):
That's just how it's defined
OpenStudy (anonymous):
Why does \(\sqrt{4}=2i\)? I don't see how they are equal if 'i' represent sqrt{-1}...
OpenStudy (bibby):
because of the properties of square roots. \[\sqrt-4=\sqrt4*\sqrt-1\]
OpenStudy (anonymous):
Thank you!
OpenStudy (bibby):
No problem
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