document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480988>Question 480988</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question: \"Each side of a square is 4 m long. When each side is increased by x m, the area is doubled. Find the value of x.\"  Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #329325 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=329325\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"Each side of a square is 4 m long. When each side is increased by x m, the area is doubled. Find the value of x.\"<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Original Area = 4^2 = 16 sq meters<BR>\n" );
document.write( "Solve:<BR>\n" );
document.write( "(4+x)^2 = 2*16<BR>\n" );
document.write( "16 + 8x + x^2 = 32<BR>\n" );
document.write( "x^2+8x-16 = 0<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = [-8 +- sqrt(64-4*1*-16)]/2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = [-8 +- 8sqrt(2)]/2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Positive solution:\r<BR>\n" );
document.write( "\n" );
document.write( "x = [-8 + 8sqrt(2)]/2<BR>\n" );
document.write( "x = 1.6569<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );