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Algebra
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OpenStudy (anonymous):
square root property (x+2)^2=-7
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OpenStudy (danjs):
\[\sqrt{-1}=i\]
OpenStudy (danjs):
\[\sqrt{-7}=\sqrt{-1*7}=\sqrt{-1}\sqrt{7}=\sqrt{7}*i\]
OpenStudy (loser66):
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