document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=64803>Question 64803</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me with this problem? I can't get it.<BR>\n" );
document.write( "Given f(x) = x^2 – 8x - 20 equation (parabola), find the following:\r<BR>\n" );
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document.write( "21.	The vertex\r<BR>\n" );
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document.write( "22.	The y-intercept(s)\r<BR>\n" );
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document.write( "Thanks a lot </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45318 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=45318\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the vertex and y-intercept of:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29+=+x%5E2+-+8x+-+20 ALIGN=MIDDLE  ALT=\"f%28x%29+=+x%5E2+-+8x+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" > Rewrite as:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2+-+8x+-+20 ALIGN=MIDDLE  ALT=\"y+=+x%5E2+-+8x+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The x-coordinate of the vertex is given by:<BR>\n" );
document.write( "<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;\" > (See the general form:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2+%2B+bx+%2B+c+=+0 ALIGN=MIDDLE  ALT=\"ax%5E2+%2B+bx+%2B+c+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In your equation, a = 1 and b = -8<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+-%28-8%29%2F2%281%29 ALIGN=MIDDLE  ALT=\"x+=+-%28-8%29%2F2%281%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+4 ALIGN=MIDDLE  ALT=\"x+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" > Substitute this into the original equation and solve for y.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+%284%29%5E2+-+8%284%29+-+20 ALIGN=MIDDLE  ALT=\"y+=+%284%29%5E2+-+8%284%29+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+16+-+32+-+20 ALIGN=MIDDLE  ALT=\"y+=+16+-+32+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-36 ALIGN=MIDDLE  ALT=\"y+=+-36\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "The vertex is at: (4, -36)\r<BR>\n" );
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document.write( "The y-intercept is found by substituting x = 0 and solving for y.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+%280%29%5E2+-+8%280%29+-+20 ALIGN=MIDDLE  ALT=\"y+=+%280%29%5E2+-+8%280%29+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-20 ALIGN=MIDDLE  ALT=\"y+=+-20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The y-intercept is at: (0, -20)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C200%2C-5%2C12%2C-38%2C5%2Cx%5E2-8x-20%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C200%2C-5%2C12%2C-38%2C5%2Cx%5E2-8x-20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );