document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=239020>Question 239020</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the center and the radius of the circle x+1 squared + y+4 squared =81.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #175602 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=175602\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x+1)^2 + (y+4)^2 = 81\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph+%28600%2C600%2C-20%2C20%2C-20%2C20%2Csqrt%2881-%28x%2B1%29%5E2%29-4%2C-sqrt%2881-%28x%2B1%29%5E2%29-4%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "the center of this circle should be at (x,y) = (-1,-4).\r<BR>\n" );
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document.write( "Graph of your equation seems to confirm that.\r<BR>\n" );
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document.write( "In order to graph, you need to solve for y.\r<BR>\n" );
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document.write( "the solved equation is:\r<BR>\n" );
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document.write( "y = -4 +/- sqrt(81-(x+1)^2)\r<BR>\n" );
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document.write( "It looks like your original equation is in the form of (x-h)^2 + (y-k)^2 = r^2 where:\r<BR>\n" );
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document.write( "h = x coordinate of the center of the circle.<BR>\n" );
document.write( "k = y coordinate of the center of the circle.<BR>\n" );
document.write( "r = the radius of the circle.<BR>\n" );
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