document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1028271>Question 1028271</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use completed square form,  (×-18)^2 +304, to solve the equation x^2 -36× -20=0 leaving answer in exact (surd) form.<BR>\n" );
document.write( "don't  know where to start on this so any help would be fab. Thanks  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #643557 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=643557\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To solve<BR>\n" );
document.write( "x^2 - 36× - 20 = 0<BR>\n" );
document.write( "by completing the square goes like this...<BR>\n" );
document.write( "We rewrite it this way...<BR>\n" );
document.write( "x^2 - 36x + _____ - 20 = 0 + ______<BR>\n" );
document.write( "What goes in the blank is found by asking, \"What is half of -36 squared?\"<BR>\n" );
document.write( "Well, half of -36 is -18, and -18 squared is 324.<BR>\n" );
document.write( "So now we have<BR>\n" );
document.write( "x^2 - 36x + 324 - 20 = 0 + 324<BR>\n" );
document.write( "Add twenty to both sides and get<BR>\n" );
document.write( "x^2 - 36x + 324 = 344<BR>\n" );
document.write( "Now rewrite the left side as a square...<BR>\n" );
document.write( "(x - 18)^2 = 344<BR>\n" );
document.write( "Now take the square root of both sides...<BR>\n" );
document.write( "x - 18 = plus/minus sqrt(344)<BR>\n" );
document.write( "and<BR>\n" );
document.write( "x = 18 plus or minus sqrt(344) = 18 +/- 2*sqrt(86) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );