document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=187479>Question 187479</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do you write this in vertex form??\r<BR>\n" );
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document.write( "y= x{squared}+ 18x-4\r<BR>\n" );
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document.write( "it is algebra 2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #140516 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=140516\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The vertex form is:<BR>\n" );
document.write( "y= a(x-h)^2+k <BR>\n" );
document.write( "where<BR>\n" );
document.write( "(h,k) is the vertex<BR>\n" );
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document.write( "For more info, see:<BR>\n" );
document.write( "http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php<BR>\n" );
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document.write( "For your problem:<BR>\n" );
document.write( "y= x^2 + 18x - 4<BR>\n" );
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document.write( "You must \"complete the square\":<BR>\n" );
document.write( "y= (x^2 + 18x) - 4<BR>\n" );
document.write( "Take half of 18 and square it:<BR>\n" );
document.write( "y= (x^2 + 18x + 81) - 4 - 81<BR>\n" );
document.write( "y= (x^2 + 18x + 81) - 85<BR>\n" );
document.write( "y = (x+9)^2 - 85  (this is what they're looking for)<BR>\n" );
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