Algebra.Com's Answer #343785 by drcole(72)![\"\"](\"/images/stars/stars-08.gif\")  
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To find the least common multiple, we need to first factor each of the expressions. The first,  , and the third,  , cannot be factored, but the second,  , is the difference of two squares:\r
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document.write( " and  \r
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document.write( "Remembering that every difference of two squares  can be factored as:\r
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document.write( "we get that\r
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document.write( "So we are trying to find the least common multiple of ,  , and . The least common multiple of three expressions A, B, and C is the simplest expression that contains A, B, and C in its factorization. So the least common multiple has to contain at least one and one in its factorization, since those appear in A and C. Do we need anything else? No, because , so doesn't add any new factors to the least common multiple. So the least common multiple must be or . \n" );
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