document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=756022>Question 756022</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let f(x) = (x+7)^2 + 3. At which value of x does f(x) have a minimum? <BR>\n" );
document.write( "(a) -7<BR>\n" );
document.write( "(b) -3<BR>\n" );
document.write( "(c) 0<BR>\n" );
document.write( "(d) 7<BR>\n" );
document.write( "(e) none of these. \r<BR>\n" );
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document.write( "I put E. Is that right? Thank you for the help in advanced! :)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #459957 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=459957\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \rho(x)\ =\ a(x\ -\ h)^2\ +\ k\"> is a parabola with a vertex at <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \left(h,\,k\right)\">.  It opens upward (and therefore the vertex is a minimum) if <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE a\ >\ 0\"> and it opens downward (and therefore the vertex is a maximum) if <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE a\ <\ 0\">.\r<BR>\n" );
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document.write( "To see this better in your case, rewrite your equation in the equivalent form:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE f(x)\ =\ 1\,\cdot\,\left(x\ -\ (-7)\right)^2\ +\ 3\">\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "<font face=\"Math1\" size=\"+2\">Egw to Beta kai to Sigma</font><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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