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OpenStudy (anonymous):
Rewrite the square-root expression as an imaginary number. sqrt(-49)
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OpenStudy (bradely):
sqrt(-49) =sqrt(49(-1)) -i=i^2 =sqrt(49(i^2)) =sqrt(49)*sqrt(i^2) =7i Source: http://www.mathskey.com/question2answer/
OpenStudy (anonymous):
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