document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=220620>Question 220620</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How to slove this Quadratic equation by completing the square: x^2+4x-8=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #165560 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=165560\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2 + 4x +_____ = 8 + _____\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Take HALF of the x term, and square the result.  In this case, half of 4 is 2, and 2 squared is 4.  So add +4 to each side:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "x^2 + 4x + 4 = 8 + 4\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Note Perfect Square Trinomial on the left side:<BR>\n" );
document.write( "(x+2)^2 = 12\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Square root each side:<BR>\n" );
document.write( "(x+2) = 0+-sqrt(12)<BR>\n" );
document.write( "x+2 = 0 +- sqrt(4)*sqrt(3)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Subtract 2 from each side:<BR>\n" );
document.write( "x= -2 +- 2*sqrt(3)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "R^2   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );