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document.write( "We square both sides:\r\n" );
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document.write( "We get 3, -3, 2, -2\r\n" );
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document.write( "But we must check for extraneous answers:\r\n" );
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document.write( "3 is not a solution\r\n" );
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document.write( "-3 is not a solution\r\n" );
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document.write( "2 is a solution\r\n" );
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document.write( "-2 is a solution\r\n" );
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document.write( "So there are only two solutions, 2 and -2.\r\n" );
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document.write( "Edwin
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