document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1168041>Question 1168041</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A parabola has a line of symmetry x = -5. The minimum value of the quadratic function that it represents is -7. Find a possible equation of this parabola and explain how you found it.<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 #792643 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=792643\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ax^2+bx+c=0<BR>\n" );
document.write( "vertex=-b/2a=-5<BR>\n" );
document.write( "s0 -b=-10a<BR>\n" );
document.write( "b=10a<BR>\n" );
document.write( "f(-5)=-7<BR>\n" );
document.write( "start with a=1 b=10<BR>\n" );
document.write( "x^2+10x+c=0<BR>\n" );
document.write( "when x=-5, y=7<BR>\n" );
document.write( "so 25-50+c=-7 and c=18<BR>\n" );
document.write( "so x^2+10x+18=0<BR>\n" );
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