Algebra.Com's Answer #664331 by ikleyn(52781)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "Solve the system and graph the curves:\r
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document.write( "x^2+y^2 = 2 ;and
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document.write( "x-y = 4
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document.write( " = 2, (1)\r\n" );
document.write( "x-y = 4 (2)\r\n" );
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document.write( "Express x = 4 + y from (2) and substitute it into (1). You will get\r\n" );
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document.write( " = 2, or\r\n" );
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document.write( " = 2, or\r\n" );
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document.write( " = 0, or\r\n" );
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document.write( " = 0.\r\n" );
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document.write( "Apply the quadratic formula. You will get\r\n" );
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document.write( " =  =  .\r\n" );
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document.write( "There are no real solutions.\r\n" );
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document.write( "See the plot\r
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document.write( "Plots y =  , y =  (red+green) and y = x-4 (blue).\r
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