document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=636909>Question 636909</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find center & foci of ellipse with equation \r<BR>\n" );
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document.write( "(x-4)squared (didn't know how to type that)/9   +  (y + 2) squared/16  =  1\r<BR>\n" );
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document.write( "What's the answer but also how do you do this problem. \r<BR>\n" );
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document.write( "Thanks<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #401328 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=401328\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find center & foci of ellipse with equation <BR>\n" );
document.write( "(x-4)squared (didn't know how to type that)/9 + (y + 2) squared/16 = 1 <BR>\n" );
document.write( "What's the answer but also how do you do this problem. <BR>\n" );
document.write( "**<BR>\n" );
document.write( "given equation: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-4%29%5E2%2F9%2B%28y%2B2%29%5E2%2F16=1 ALIGN=MIDDLE  ALT=\"%28x-4%29%5E2%2F9%2B%28y%2B2%29%5E2%2F16=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is an equation for an ellipse with vertical major axis:<BR>\n" );
document.write( "Its standard form: (x-h)^2/b^2-(y-k)^2/a^2=1, (a>b), (h,k)=(x,y) coordinates of center<BR>\n" );
document.write( "For given equation: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-4%29%5E2%2F9%2B%28y%2B2%29%5E2%2F16=1 ALIGN=MIDDLE  ALT=\"%28x-4%29%5E2%2F9%2B%28y%2B2%29%5E2%2F16=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "center: (4,-2)<BR>\n" );
document.write( "a^2=16<BR>\n" );
document.write( "a=&#8730;16=4<BR>\n" );
document.write( "b^2=9<BR>\n" );
document.write( "b=&#8730;9=3<BR>\n" );
document.write( "c^2=a^2-b^2=16-=7<BR>\n" );
document.write( "c=&#8730;7&#8776;2.7<BR>\n" );
document.write( "Foci: (4,-2±c)=(4,-2±2.7)=(4,-4.7) and (4,0.7) </SPAN>\n" );
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