document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=860307>Question 860307</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the equation of the ellipse given the foci (+/-5,0) and co-vertices (0,+/-4). <BR>\n" );
document.write( "I have tried putting it in x^2/a^2+y^2/b^2=1 but I'm not sure if it's the right form, and if it is what to do next. It does not have to be graphed, thank you for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #518319 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=518319\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The center is at (0,0) according to your foci and co-vertices.  This makes identifying <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c=5 ALIGN=MIDDLE  ALT=\"c=5\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b=4 ALIGN=MIDDLE  ALT=\"b=4\"   DISABLED_style= \"max-width:90%; height:auto;\" >, easy to do.  The \"b\" information will go under the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2 ALIGN=MIDDLE  ALT=\"y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > in your standard equation.  The reason is that b is for your co-vertices.  a is for your vertex (the main vertices).\r<BR>\n" );
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document.write( "The numbers, a, b, and c, are related according to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2%2Bb%5E2=c%5E2 ALIGN=MIDDLE  ALT=\"a%5E2%2Bb%5E2=c%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >...\r<BR>\n" );
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document.write( "Can you finish this? </SPAN>\n" );
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