document.write( "Question 702147: I don't understand how to do radicals with numbers, like 8 square rooted by 3 is 2. My problem is to simplify this: sqrt (81x^2) with the little radical number being 3. if that makes sense. \n" ); document.write( "

Algebra.Com's Answer #432835 by KMST(5328) $\"\"$ $\"About$

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Inside a cubic root, factor out anything that is a cube.
\n" ); document.write( "Then split the root into a product of the roots of the factors,
\n" ); document.write( "and then simplify that part that can be simplified.
\n" ); document.write( " $\"root%283%2C8%29=root%283%2C2%5E3%29=2\"$
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