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What is the value of √-a ×√-b in complex no

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What is the value of √-a ×√-b in complex no
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1 Answer

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√-a×√-b

=√-1×√a×√-1×√b

= i × √a × i × √b        (because √-1=i)

= i² × √ab

=-1√ab.        (because i² = -1)

=-√ab

Answer is √-ab


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