document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=818004>Question 818004</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The foci of a ellipse are F1(2,0) and F2(-2,0) and the sum of the focal radii is 6 units. Find the equation.\r<BR>\n" );
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document.write( "Thanks so much in advance:) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492365 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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/cgi-bin/show-face.mpl?user=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492365\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> eccentricity:<BR>\n" );
document.write( "f^2 = a^2 &#8722; b^2<BR>\n" );
document.write( "f = 2<BR>\n" );
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document.write( "sum of focal radii is 6:<BR>\n" );
document.write( "2a = 6<BR>\n" );
document.write( "a = 3<BR>\n" );
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document.write( "f^2 = a^2 &#8722; b^2<BR>\n" );
document.write( "2^2 = 3^2 &#8722; b^2<BR>\n" );
document.write( "4 = 9 &#8722; b^2<BR>\n" );
document.write( "b^2 = 5<BR>\n" );
document.write( "b = sqrt( 5 )<BR>\n" );
document.write( "b = 2.236068<BR>\n" );
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document.write( "ellipse eqn:<BR>\n" );
document.write( "(x/a)^2 + (y/a)^2 = 1<BR>\n" );
document.write( "(x/3)^2 + (y/sqrt( 5 ))^2 = 1<BR>\n" );
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document.write( "answer:<BR>\n" );
document.write( "(1/9)x^2 + (1/5)y^2 = 1<BR>\n" );
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document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
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document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Convert fractions, decimals, and percents:<BR>\n" );
document.write( "https://sooeet.com/math/fraction-decimal-percent.php<BR>\n" );
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document.write( "Calculate and graph the linear regression of any data set:<BR>\n" );
document.write( "https://sooeet.com/math/linear-regression.php </SPAN>\n" );
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