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document.write( "let z = x + yi, where x and y are real\r\n" );
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document.write( "Substitute in\r\n" );
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document.write( "
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document.write( "Set real parts equal, and imaginary parts equal:\r\n" );
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document.write( "
, 
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document.write( "Substitute y=4\r\n" );
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document.write( "Square both sides:\r\n" );
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document.write( "Cancel the x2's\r\n" );
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document.write( "
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document.write( "But we must check to see if 3 is \r\n" );
document.write( "a solution or only an extraneous answer.\r\n" );
document.write( "Substitute in:\r\n" );
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document.write( "
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document.write( "
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document.write( "That's false so 3 is extraneous and there\r\n" );
document.write( "is no solution.\r\n" );
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document.write( "Edwin
\n" );
document.write( "![\"\"](\"/images/stars/stars-13.gif\")
