document.write( "Question 1157739: The polynomial \"x%5E8+-+1\" is factored as
\n" ); document.write( "\"x%5E8+-+1+=+p_1%28x%29+%2A+p_2%28x%29\"....\"p_k%28x%29\",where each factor \"p_i%28x%29\" is a non-constant polynomial with real coefficients. Find the largest possible value of k.
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Algebra.Com's Answer #780619 by ikleyn(52790)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "    \"x%5E8-1%29\" = \"%28x%5E4-1%29%2A%28x%5E4%2B1%29\" = \"%28x%5E2-1%29%2A%28x%5E2%2B1%29%2A%28x%5E4%2B1%29\" = \"%28x-1%29%2A%28x%2B1%29%2A%28x%5E2%2B1%29%2A%28x%5E4%2B1%29\".     (1)\r\n" );
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document.write( "The factor  \"x%5E4%2B1\"  also can be factored over real numbers\r\n" );
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document.write( "    \"x%5E4+%2B+1\" = \"%28x%5E4+%2B+2x%5E2+%2B1%29\" - \"2x%5E2\" = \"%28x%5E2%2B1%29%5E2\" - \"%28sqrt%282%29%2Ax%29%5E2\" = \"%28x%5E2+%2B+%28sqrt%282%29%29%2Ax+%2B1%29%2A%28x%5E2+-+%28sqrt%282%29%29%2Ax+%2B1%29\".\r\n" );
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document.write( "   +--------------------------------------------------------------------------------------------------------+\r\n" );
document.write( "   |  Far not everyone knows about this tricky decomposition; but those who are trained in Math, know it.   |\r\n" );
document.write( "   |      See the lesson  Advanced factoring  in this site.                                                 |\r\n" );
document.write( "   +--------------------------------------------------------------------------------------------------------+\r\n" );
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document.write( "Therefore, decomposition (1) can be continue farther\r\n" );
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document.write( "    \"x%5E8-1%29\" = \"%28x%5E4-1%29%2A%28x%5E4%2B1%29\" = \"%28x%5E2-1%29%2A%28x%5E2%2B1%29%2A%28x%5E4%2B1%29\" = .\r\n" );
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document.write( "Three remaining quadratic polynomials CAN NOT be factored further over real numbers.\r\n" );
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document.write( "Therefore,  k = 5  is the largest value of \" k \"  under the problem's question.      ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "The answer and the statement  \" k = 4 \"  by  @greenestamps  is not correct.\r
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