document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=136611>Question 136611</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the x-intercept(s) and he coordinates of the vertex for the parabola <BR>\n" );
document.write( "y=x^2-4x-12. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100042 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=100042\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For any parabola <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=ax%5E2%2Bbx%2Bc ALIGN=MIDDLE  ALT=\"y=ax%5E2%2Bbx%2Bc\"   DISABLED_style= \"max-width:90%; height:auto;\" >, the x-coordinate of the vertex is at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b%2F2a ALIGN=MIDDLE  ALT=\"-b%2F2a\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Calculate that value, substitute it for x, and then calculate the y-coordinate value.\r<BR>\n" );
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document.write( "The x-intercepts are ordered pairs of the form (x,0),  So set the trinomial equal to zero and solve, either by factoring and using the zero product rule, completing the square, or using the quadratic formula. </SPAN>\n" );
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