document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=2820>Question 2820</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the axis of symmetry of x^2+9x+4? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #1206 by </B><A HREF=/tutors/aboutme.mpl?userid=kiru_khandelwal><B>kiru_khandelwal(79)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=kiru_khandelwal><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=1206\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the equation of the parabola is of the form ax^2 + bx + c  = y<BR>\n" );
document.write( "then the axis of symmetry is x=-b/2a\r<BR>\n" );
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document.write( "In our case<BR>\n" );
document.write( "x^2 + 9x + 4<BR>\n" );
document.write( "=> a =1 b = 9 and c = 4<BR>\n" );
document.write( "so axis of symmetry is x= -b/2a = -9/2*1 = -9/2<BR>\n" );
document.write( "s = -9/2 </SPAN>\n" );
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