document.write( "Question 473120: What is the index of a radical? When workjing with radicals can the radicand be negative when the index is odd? Can it be negative when the index is even? \n" ); document.write( "

Algebra.Com's Answer #324406 by stanbon(75887) $\"\"$ $\"About$

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What is the index of a radical? When working with radicals can the radicand be negative when the index is odd? Can it be negative when the index is even?
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\n" ); document.write( "The index is the root number:
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\n" ); document.write( "The radicand can be negative:
\n" ); document.write( "If the index is odd and the radicand is negative the root is negative.
\n" ); document.write( "Example: cbrt(-27) = -3
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\n" ); document.write( "If the root is even and the radicand is negative the root is complex.
\n" ); document.write( "Example: sqrt(-27) = 3sqrt(3)i
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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