This is exactly like the other one I did for you, except\r\n" );
document.write( "it opens left instead of right. Hey, you've got to learn this \r\n" );
document.write( "stuff, because you have to pass the tests all by yourself. \r\n" );
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\r\n" );
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document.write( "has vertex (h,k), and distance from vertex to both focus\r\n" );
document.write( "and directrix is |p|. If p is negative the parabola opens\r\n" );
document.write( "leftt with the vertical directrix is |p| units right of the \r\n" );
document.write( "vertex and the focus is |p| units left of the vertex. \r\n" );
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\r\n" );
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document.write( "has vertex (0,0), and distance from vertex to both focus\r\n" );
document.write( "and directrix is |-25/4| or 25/4. Since -25/4 is negative the \r\n" );
document.write( "parabola opens left with the vertical directrix 25/4 units \r\n" );
document.write( "right of the vertex and the focus is 25/4 left of the vertex. \r\n" );
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document.write( "So the focus is 25/4 units left of vertex (0,0) which is (-25/4,0),\r\n" );
document.write( "and the directrix is a vertical line 25/4 units right of the \r\n" );
document.write( "vertex (0,0) which is the vertical line x = 25/4\r\n" );
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document.write( "Edwin
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