document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28739>Question 28739</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have to complete the square and dont understand how you do it. Can you explain???\r<BR>\n" );
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document.write( "Ex1: X squared - 2X-5=0\r<BR>\n" );
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document.write( "EX2:Ysquared + 8y+6=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15675 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15675\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Get the equation into the form (x + a)^2 -k = 0<BR>\n" );
document.write( "expand<BR>\n" );
document.write( "[1] x^2 + 2ax + a^2 -k = 0<BR>\n" );
document.write( "[2] x^2 -2x -5 = 0<BR>\n" );
document.write( "comparing coefficients of x<BR>\n" );
document.write( "-2 = 2a<BR>\n" );
document.write( "a = -1<BR>\n" );
document.write( "a^2 = +1<BR>\n" );
document.write( "substituting in [1]<BR>\n" );
document.write( "x^2 -2x +1 -k = 0<BR>\n" );
document.write( "In order for this = [2], k = -6<BR>\n" );
document.write( "(x - 1)^2 -6 = 0<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "y^2 +8y + 6 = 0<BR>\n" );
document.write( "y^2 + 2ay + a^2 -k = 0<BR>\n" );
document.write( "2a = 8<BR>\n" );
document.write( "a = 4<BR>\n" );
document.write( "a^2 = 16<BR>\n" );
document.write( "y^2 + 8y + 16 -10 = 0<BR>\n" );
document.write( "(y + 4)^2 -10 = 0 </SPAN>\n" );
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