document.write( "Question 888545: Find the greatest common factor and factor it out of the expression.
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Algebra.Com's Answer #537445 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Look for a number.\r\n" );
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document.write( "3 is the largest common factor of 3 and 21, so we take out 3\r\n" );
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document.write( "Now look for letters.\r\n" );
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document.write( "x and y appear in both terms, and the LARGEST power we can take\r\n" );
document.write( "out is the SMALLEST power that appears, which is  and \r\n" );
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document.write( "So we take out the GCF, which is \r\n" );
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document.write( "Edwin

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