document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1119704>Question 1119704</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the coordinates of the vertex for the parabola defined by the given quadratic function.\r<BR>\n" );
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document.write( "f(x) = -x2 + 12x + 4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #735306 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=735306\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -x^2+12x+4=f(x)<BR>\n" );
document.write( "vertex x point is -b/2a; a=-1, b=12, so vertex has x value of 6<BR>\n" );
document.write( "f(6)=-36+72+4=40<BR>\n" );
document.write( "(6, 40)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-10%2C10%2C-30%2C50%2C-x%5E2%2B12x%2B4%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-10%2C10%2C-30%2C50%2C-x%5E2%2B12x%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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