document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=306129>Question 306129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> jacob discovered that the x intercepts of a certain parabola are (3,0) and a(-1,0), but now he needs to find the vertex. can you get him started? what   do you know about the vertex? draw a sketch of this parabola to help you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #219129 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=219129\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Jacob discovered that the x intercepts of a certain parabola are (3,0) and <BR>\n" );
document.write( "(-1,0), but now he needs to find the vertex. can you get him started? what do you know about the vertex? draw a sketch of this parabola to help you<BR>\n" );
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document.write( "The vertex is half-way between -1 and 3, so the x-value is 1.<BR>\n" );
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document.write( "The y-value is either positive (opens down) or negative (opens up).<BR>\n" );
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document.write( "The form of the equation is y = k(x-3)(x+1)<BR>\n" );
document.write( "You'll have to draw the sketch.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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