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OpenStudy (anonymous):
Simplify the number using the imaginary unit i. ( I will attach pictures . ) *
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OpenStudy (anonymous):
OpenStudy (unklerhaukus):
\[\sqrt{-28}=\sqrt{-1}\sqrt{4}\sqrt 7=\]
OpenStudy (anonymous):
so it would be the 1st one ?
OpenStudy (anonymous):
\[sqrt{i ^{2}28}\]=\[2i sqrt{7}\]
OpenStudy (unklerhaukus):
not the first one , do you know the sqrt of -1 ?
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