document.write( "Question 1199474: find the following:Semi-Transverse length a, Semi-Conjugate length b,Vertices,Co-Vertices and Foci of 9x^2-4y^2-36x+8y=4 \n" ); document.write( "
Algebra.Com's Answer #833382 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "I forgot to do the foci above.\r\n" );
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document.write( "The focal distance is c, which is found from the Pythagorean\r\n" );
document.write( "relation \"c%5E2=a%5E2%2Bb%5E2\"\r\n" );
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document.write( "\"c%5E2=4%5E2%2B5%5E2\"\r\n" );
document.write( "\"c%5E2=16%2B25\"\r\n" );
document.write( "\"c%5E2=41\"\r\n" );
document.write( "\"c=sqrt%2841%29\"  <---(I think on your problem this comes out to be an integer.)\r\n" );
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document.write( "So the foci are \"sqrt%2841%29\" or about 6.4 units right and left of the\r\n" );
document.write( "center. so we get two points right and left of the center about 6.4 units\r\n" );
document.write( "from the center, the foci are approximately (4+6.4,3) and (4-6.4,3), which\r\n" );
document.write( "are approximately the points (10.4,3) and (-2.4,3), as shown on the graph\r\n" );
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document.write( "Edwin
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