document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=872135>Question 872135</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write the equation for the ellipse and find your foci points: <BR>\n" );
document.write( "v1 and v2: (-9,5) and (7,5)<BR>\n" );
document.write( "cv1 and cv2: (-1,11) and (-1, -1)<BR>\n" );
document.write( "I attempted this problem and found that my center was at (-1, 5)<BR>\n" );
document.write( "the equation formula that I have to use is (x-h)^2 + (y-k)^2<BR>\n" );
document.write( "                                all over      a^2       b^2<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #526087 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=526087\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> write the equation for the ellipse and find your foci points: <BR>\n" );
document.write( "v1 and v2: (-9,5) and (7,5)<BR>\n" );
document.write( "cv1 and cv2: (-1,11) and (-1, -1)<BR>\n" );
document.write( "***<BR>\n" );
document.write( "Given ellipse has a horizontal major axis<BR>\n" );
document.write( "Its standard form of equation: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-h%29%5E2%2Fa%5E2%2B%28y-k%29%5E2%2Fb%5E2=1 ALIGN=MIDDLE  ALT=\"%28x-h%29%5E2%2Fa%5E2%2B%28y-k%29%5E2%2Fb%5E2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >a>b, (h,k)=coordinates of center<BR>\n" );
document.write( "center: (-1,5)<BR>\n" );
document.write( "length of horizontal major axis=16=2a<BR>\n" );
document.write( "a=8<BR>\n" );
document.write( "a^2=64<BR>\n" );
document.write( "length of co-vertices=12=2b<BR>\n" );
document.write( "b=6<BR>\n" );
document.write( "b^2=36<BR>\n" );
document.write( "c^2=a^2-b^2=64-36=28<BR>\n" );
document.write( "c=&#8730;28<BR>\n" );
document.write( "foci:(&#8730;28,5),(-&#8730;28,5)<BR>\n" );
document.write( "equation of given ellipse: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B1%29%5E2%2F64%2B%28y-5%29%5E2%2F36=1 ALIGN=MIDDLE  ALT=\"%28x%2B1%29%5E2%2F64%2B%28y-5%29%5E2%2F36=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );