document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=441503>Question 441503</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can anyone help with the following problelm?<BR>\n" );
document.write( "Determine the vertex of the parabola.\r<BR>\n" );
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document.write( "f(x) = x2 - 10x + 26<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #304729 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=304729\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x) = x^2 - 10x + 26<BR>\n" );
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document.write( "The vertex is on the line of symmetry<BR>\n" );
document.write( "The line of symm is x = -b/2a<BR>\n" );
document.write( "x = 10/2 = 5<BR>\n" );
document.write( "f(5) = 25 - 50 + 26 = 1<BR>\n" );
document.write( "Vertex at (5,1)<BR>\n" );
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document.write( "Another method:<BR>\n" );
document.write( "f(x) = x^2 - 10x + 26<BR>\n" );
document.write( "f'(x) = 2x - 10 = 0<BR>\n" );
document.write( "x = 5<BR>\n" );
document.write( "f(5) .... as above<BR>\n" );
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