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OpenStudy (anonymous):
how do you simplify √-4 using the imaginary number i ?
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OpenStudy (turingtest):
\[\sqrt{-4}=\sqrt{-1\cdot4}=\sqrt{-1}\cdot\sqrt4\]you should be able to do both those square roots individually. multiply the answers
OpenStudy (turingtest):
\[\sqrt{-1}=i\]
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