document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1208664>Question 1208664</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve for r.\r<BR>\n" );
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document.write( "S = (a^2)/(1 - sqrt{r^4})<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 #847052 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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=847052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "Note that<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28r%5E4%29+=+%28r%5E4%29%5E%281%2F2%29%5E%22%22+=+r%5E%284%2A%281%2F2%29%29+=+r%5E2 ALIGN=MIDDLE  ALT=\"sqrt%28r%5E4%29+=+%28r%5E4%29%5E%281%2F2%29%5E%22%22+=+r%5E%284%2A%281%2F2%29%29+=+r%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So we can say,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+=+%28a%5E2%29%2F%281+-+sqrt%28r%5E4%29%29 ALIGN=MIDDLE  ALT=\"S+=+%28a%5E2%29%2F%281+-+sqrt%28r%5E4%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+=+%28a%5E2%29%2F%281+-+r%5E2%29 ALIGN=MIDDLE  ALT=\"S+=+%28a%5E2%29%2F%281+-+r%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%281-r%5E2%29+=+a%5E2 ALIGN=MIDDLE  ALT=\"S%281-r%5E2%29+=+a%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S-S%2Ar%5E2+=+a%5E2 ALIGN=MIDDLE  ALT=\"S-S%2Ar%5E2+=+a%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Sr%5E2+=+S-a%5E2 ALIGN=MIDDLE  ALT=\"Sr%5E2+=+S-a%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2+=+%28S-a%5E2%29%2FS ALIGN=MIDDLE  ALT=\"r%5E2+=+%28S-a%5E2%29%2FS\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%22%22%2B-sqrt%28%28S-a%5E2%29%2FS%29 ALIGN=MIDDLE  ALT=\"r+=+%22%22%2B-sqrt%28%28S-a%5E2%29%2FS%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "In other words,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+sqrt%28%28S-a%5E2%29%2FS%29 ALIGN=MIDDLE  ALT=\"r+=+sqrt%28%28S-a%5E2%29%2FS%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+-sqrt%28%28S-a%5E2%29%2FS%29 ALIGN=MIDDLE  ALT=\"r+=+-sqrt%28%28S-a%5E2%29%2FS%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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