document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=739209>Question 739209</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an ellipse x^2/(4c^2) + y^2/(c^2) = 1 and a circle x^2 + y ^2 = 9a^2 cuts at 4 points. then the relation between a and c is </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #451053 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</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=451053\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Any way you do this will require an x or a y staying involved.  I tried solving the ellipse for y^2, and substituted this into the circle equation; and solved for a.\r<BR>\n" );
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document.write( "This result gave <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=sqrt%28%281%2F12%29x%5E2%2Bc%5E2%29 ALIGN=MIDDLE  ALT=\"a=sqrt%28%281%2F12%29x%5E2%2Bc%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  \r<BR>\n" );
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document.write( "You could try solving for x^2 first, and do similarly. </SPAN>\n" );
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