document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=558423>Question 558423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 7x^2+3y^2-21=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #363077 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=363077\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7x^2+3y^2-21=0<BR>\n" );
document.write( "divide by21<BR>\n" );
document.write( "x^2/3+y^2/7=1<BR>\n" );
document.write( "This is an equation of an ellipse with vertical major axis of the standard form: <BR>\n" );
document.write( "(x-h)^2/b^2+(y-k)^2/a^2,a>b, (h,k) being the (x,y) coordinates of the center.<BR>\n" );
document.write( "..<BR>\n" );
document.write( "For given equation:<BR>\n" );
document.write( "center: (0,0)<BR>\n" );
document.write( "a^2=7<BR>\n" );
document.write( "b^2=3 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );