document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=64772>Question 64772</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a graph of y=x^2+2x-9 - how would one find the vertex of this graph. Your help would be sincerely appreciated. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45288 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=45288\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=x^2+2x-9 - how would one find the vertex<BR>\n" );
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document.write( "The minimum or maximum occurs when x=-b/2a<BR>\n" );
document.write( "In your case x=-2/2=-1<BR>\n" );
document.write( "The corresponding y value is:<BR>\n" );
document.write( "f(-1)=(-1)^2+2(-1)-9<BR>\n" );
document.write( "f(-1)=1-2-9=-10<BR>\n" );
document.write( "The vertex is at (-1,-10)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28600%2C400%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B2x-9%29 ALIGN=MIDDLE  ALT=\"graph%28600%2C400%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B2x-9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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