document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=9378>Question 9378</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here is the second problem that I was talking about in another submitted question.  A friend of mine thinks that the answer that we found to this question is wrong, but if it is than I don't know how to solve it.  Could you help us.  It is also a elipse problem that reads-\r<BR>\n" );
document.write( "\n" );
document.write( "Graph the equation and find the coordinates of the foci.\r<BR>\n" );
document.write( "\n" );
document.write( "(25x^2)-(144Y^2)= 3600\r<BR>\n" );
document.write( "\n" );
document.write( "I think that there might be a mistake in this problem, but what do I know?  That's why I'm asking you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #5103 by </B><A HREF=/tutors/aboutme.mpl?userid=mathmaven53><B>mathmaven53(29)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathmaven53><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=5103\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 25x^2 - 144y^2 = 3600\r<BR>\n" );
document.write( "\n" );
document.write( " Divide both sides by 3600 and simplify\r<BR>\n" );
document.write( "\n" );
document.write( " x^2/144 - y^2/25 = 1\r<BR>\n" );
document.write( "\n" );
document.write( " This is the equation of a hyperbola.\r<BR>\n" );
document.write( "\n" );
document.write( " In general x^/a^2 - y^2/b^2 = 1 is the equation of a hyperbola for nonzero a and b\r<BR>\n" );
document.write( "\n" );
document.write( " In its derivation the quantity b^2 = c^2 - a^2 where c is the x coordinate of a focus.\r<BR>\n" );
document.write( "\n" );
document.write( " We have a^2 = 144 and b^2 = 25\r<BR>\n" );
document.write( "\n" );
document.write( " So c^2 = a^2 + b^2\r<BR>\n" );
document.write( "\n" );
document.write( "         = 169\r<BR>\n" );
document.write( "\n" );
document.write( " So the hyperbola x^2/144 - y^2/25 = 1 has foci at (-c,0) and (c,0)\r<BR>\n" );
document.write( "\n" );
document.write( " In other words foci at (-13,0) and (13,0)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );