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OpenStudy (anonymous):
What is equivalent to the expression sqr root of -121? A. 11i B. -11i C. sqr root 11i D. - sqr root 11 E. - sqr root 11i
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OpenStudy (anonymous):
\[\sqrt{-121}= \sqrt{121\times-1}=11\times \sqrt{-1}=11i\]
OpenStudy (anonymous):
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