document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=375207>Question 375207</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the sides of a rectangle whose perimeter is 40 and diagonal is 18? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #266830 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=266830\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> perimeter = 40 <BR>\n" );
document.write( "2(L+W)=40<BR>\n" );
document.write( "L+W=20<BR>\n" );
document.write( "L= 20-W<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Diagonal = 18<BR>\n" );
document.write( "..<BR>\n" );
document.write( "width^2 + length^2 = diagonal ^2<BR>\n" );
document.write( "W^2+(20-W)^2=diagonal^2<BR>\n" );
document.write( "W^2+400-40W+W^2=D^2<BR>\n" );
document.write( "2W^2-40W+400 = 18^2<BR>\n" );
document.write( "2W^2-40W+400=324<BR>\n" );
document.write( "2W^2-40w+76=0<BR>\n" );
document.write( "/2<BR>\n" );
document.write( "W^2-20W+38=0<BR>\n" );
document.write( "..<BR>\n" );
document.write( "find the roots x1 & x2 by using quadratic formula<BR>\n" );
document.write( "discriminant b^2-4ac=248<BR>\n" );
document.write( "x1=((20+sqrt(248))/2<BR>\n" );
document.write( "x1= 17.87<BR>\n" );
document.write( "x2=((20-sqrt(248))/2<BR>\n" );
document.write( "2.13<BR>\n" );
document.write( "the other side will be 20-17.87 = 2.13<BR>\n" );
document.write( "..<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );