document.write( "Question 633603: Simplify
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Algebra.Com's Answer #398997 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"%28-x%5E2-4x%2B21%29%2F%283-x%29\"\r\n" );
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document.write( "Quadratics are difficult to factor if the leading term is negative,\r\n" );
document.write( "To make the x² term positive, let's multiply by \"%28%28-1%29%2F%28-1%29%29\"\r\n" );
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document.write( "\"%28%28-1%29%2F%28-1%29%29\"·\"%28%28-x%5E2-4x%2B21%29%2F%283-x%29%29\" =\r\n" );
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document.write( "\"%28-1%28-x%5E2-4x%2B21%29%29%2F%28-1%283-x%29%29\"\r\n" );
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document.write( "\"%28x%5E2%2B4x-21%29%2F%28-3%2Bx%29\"\r\n" );
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document.write( "Write the denominator in descending order:\r\n" );
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document.write( "\"%28x%5E2%2B4x-21%29%2F%28x-3%29\"\r\n" );
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document.write( "Factor the numerator\r\n" );
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document.write( "\"%28%28x%2B7%29%28x-3%29%29%2F%28x-3%29\"\r\n" );
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document.write( "Cancel the (x-3)'s\r\n" );
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document.write( "\"%28%28x%2B7%29%28cross%28x-3%29%29%29%2F%28cross%28x-3%29%29\"\r\n" );
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document.write( "x+7\r\n" );
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document.write( "Edwin
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