document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1200537>Question 1200537</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an equation of the line containing the centers of the 2 circles \r<BR>\n" );
document.write( "\n" );
document.write( "x^2 + y^2 - 4x + 6y + 4 = 0 and x^2 + y^2 + 6x + 4y + 9 = 0.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #834756 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=834756\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Put each circle's equation into standard form, using Completing-The-Square, if necessary.  Read the center point of each circle from the standard form equations.    Now you would have the two points for the equation of the line you want to find.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The two circle equations are<BR>\n" );
document.write( "(x-2)^2+(y+3)^2=9 showing center at (2,-3)<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(x+3)^2+(y+2)^2=4 showing center at (-3,-2).\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "You should be able to do the rest, now havig the two required points for the line.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "---<BR>\n" );
document.write( "---\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Either  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-x%2F5-13%2F5 ALIGN=MIDDLE  ALT=\"y=-x%2F5-13%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" >  or  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B5y=-13 ALIGN=MIDDLE  ALT=\"x%2B5y=-13\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );