document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207259>Question 207259</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the question is:  solve the quadratic equation by completing the square: \r<BR>\n" );
document.write( "\n" );
document.write( "x^2-20x=0\r<BR>\n" );
document.write( "\n" );
document.write( "x^2-20x+(20/2)^2 = (20/2)^2<BR>\n" );
document.write( "(sqrt x - sqrt 10^2)^2 = sqrt 100<BR>\n" );
document.write( "x-10 = +- 10\r<BR>\n" );
document.write( "\n" );
document.write( "x-10=10     x-10 =-10<BR>\n" );
document.write( "  x=20         x=0\r<BR>\n" );
document.write( "\n" );
document.write( "I am checking to make sure I did the work correctly, this isn't from a textbook so I don't have a page # or anything to reference too.\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #156711 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=156711\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2 -20x =0<BR>\n" );
document.write( ".<BR>\n" );
document.write( "x^2 -20x +(20/2)^2 = (20/2)^2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "x^2 -20x +100 = 100<BR>\n" );
document.write( ".<BR>\n" );
document.write( "(x-10)^2 =100<BR>\n" );
document.write( ".<BR>\n" );
document.write( "take  sqrt  of  both  sides<BR>\n" );
document.write( ".<BR>\n" );
document.write( "+/- (x-10) = +/- 10<BR>\n" );
document.write( ".<BR>\n" );
document.write( "(x-10) =10,,,x=20,,check,,(20)^2 -20(20)=0,,400-400=0,,ok<BR>\n" );
document.write( ".<BR>\n" );
document.write( "(x-10)= -10,,,x=0,,check,,(0)^2 -20(0)=0,,,ok<BR>\n" );
document.write( ".<BR>\n" );
document.write( "-x+10=10,,x=0,,,check,,ok<BR>\n" );
document.write( ".<BR>\n" );
document.write( "-x+10=-10,,x=20,,check,,ok<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Therefore,,,x=0,20\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );