document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=374342>Question 374342</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the vertex of the parabola.\r<BR>\n" );
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document.write( "y = -4x2 - 16x - 11\r<BR>\n" );
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document.write( "Possible answers\r<BR>\n" );
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document.write( "      (5, 2)<BR>\n" );
document.write( "      (2, 5)<BR>\n" );
document.write( "      (-2, 5)<BR>\n" );
document.write( "      (5, -2)<BR>\n" );
document.write( "any help would be great<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 #266386 by </B><A HREF=/tutors/aboutme.mpl?userid=Jk22><B>Jk22(389)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Jk22><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=Jk22><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=266386\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y = -4x2 - 16x - 11<BR>\n" );
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document.write( "derivative : y' = -8x -16 (at the vertex, extremum : y'=0 => x = -2)\r<BR>\n" );
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document.write( "hence the solution is (-2,5) (verif : y(-2)=-16+32-11=16-11=5) </SPAN>\n" );
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