document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=822081>Question 822081</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the center of the circle defined y the equation x^2+2x+y^2=15 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #494947 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=494947\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> what is the center of the circle defined y the equation x^2+2x+y^2=15<BR>\n" );
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document.write( "Standard form of equation for a circle: (x-h)^2+(y-k)^2=r^2, (h,k)=coordinates of center, r=radius<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x^2+2x+y^2=15<BR>\n" );
document.write( "complete the square:<BR>\n" );
document.write( "(x^2+2x+1+y^2=15+1<BR>\n" );
document.write( "(x+1)^2+y^2=16<BR>\n" );
document.write( "center:(-1,0) </SPAN>\n" );
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