document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=156547>Question 156547</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0495554030/algebrahomeworkh>college algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> could somebody help, me please?<BR>\n" );
document.write( "1)find the center and length of a radius of each circle\r<BR>\n" );
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document.write( "a) x^2+y^2+8x-12x+43=0<BR>\n" );
document.write( "I tried. and got stuck<BR>\n" );
document.write( "(x^2+8x)+(y^2-12y)=-43<BR>\n" );
document.write( "(x^2+8x=43)^2 + (y^2-12y+12)^2=-43+43+12<BR>\n" );
document.write( "then.... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #115305 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=115305\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2By%5E2%2B8x-12y%2B43=0 ALIGN=MIDDLE  ALT=\"x%5E2%2By%5E2%2B8x-12y%2B43=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B8x%2By%5E2-12y%2B43=0 ALIGN=MIDDLE  ALT=\"x%5E2%2B8x%2By%5E2-12y%2B43=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "then (completing squares)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E2%2B8x%2B16%29%2B%28y%5E2-12y%2B36%29-16-36%2B43=0 ALIGN=MIDDLE  ALT=\"%28x%5E2%2B8x%2B16%29%2B%28y%5E2-12y%2B36%29-16-36%2B43=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B4%29%5E2%2B%28y-6%29%5E2-9=0 ALIGN=MIDDLE  ALT=\"%28x%2B4%29%5E2%2B%28y-6%29%5E2-9=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B4%29%5E2%2B%28y-6%29%5E2=9 ALIGN=MIDDLE  ALT=\"%28x%2B4%29%5E2%2B%28y-6%29%5E2=9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "then center is (-4,6) and radius is 3\r<BR>\n" );
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document.write( "You can do the exercises using formulas too<BR>\n" );
document.write( " </SPAN>\n" );
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