document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=748380>Question 748380</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this problem 81x^2+4y^2-324=0 (conics) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #455924 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=455924\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 81x^2+4y^2-324=0<BR>\n" );
document.write( "81x^2+4y^2=324<BR>\n" );
document.write( "divide by 324<BR>\n" );
document.write( "x^2/4+y^2/81=1<BR>\n" );
document.write( "This is an equation of an ellipse with vertical 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%2Fb%5E2%2B%28y-k%29%5E2%2Fa%5E2=1 ALIGN=MIDDLE  ALT=\"%28x-h%29%5E2%2Fb%5E2%2B%28y-k%29%5E2%2Fa%5E2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For given equation:<BR>\n" );
document.write( "center: (0,0)<BR>\n" );
document.write( "a^2=81<BR>\n" );
document.write( "a=9<BR>\n" );
document.write( "length of vertical major axis=2a=18<BR>\n" );
document.write( "b^2=4<BR>\n" );
document.write( "b=2<BR>\n" );
document.write( "length of minor axis=2b=4 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );