document.write( "Question 1054878: Find all number for which the rational expression is undefined\r
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Algebra.Com's Answer #670073 by ikleyn(52800)\"\" \"About 
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document.write( "The numbers for which the rational expression  \"%28y%5E2%2B5%29%2F%28y%5E2-y-30%29\"  is undefined\r\n" );
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document.write( "are the roots of the polynomial \"y%5E2-y-30\" of the denominator.\r\n" );
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document.write( "\"y%5E2-y-30\" = (x-6)*(x+5).\r\n" );
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document.write( "The roots are x=6 and x= -5.\r\n" );
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document.write( "Answer.  x=6 and x= -5.\r\n" );
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