document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=146209>Question 146209</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When the parabola: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2-a%28x%2B1%29%2B3 ALIGN=MIDDLE  ALT=\"y+=+x%5E2-a%28x%2B1%29%2B3\"   DISABLED_style= \"max-width:90%; height:auto;\" > intersects the x-axis at one point, then a must equal ___ or ___. \r<BR>\n" );
document.write( "\n" );
document.write( "What I've got so far, (not a lot unfortunately):\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+0 ALIGN=MIDDLE  ALT=\"y+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0+=+x%5E2-a%28x%2B1%29%2B3 ALIGN=MIDDLE  ALT=\"0+=+x%5E2-a%28x%2B1%29%2B3\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+%28x%5E2%2B3%29%2F%28x%2B1%29 ALIGN=MIDDLE  ALT=\"a+=+%28x%5E2%2B3%29%2F%28x%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "and here I become unstuck. No use of graphics calculator permitted. Much thanks for any help!\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #106761 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=106761\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  the parabola:  intersects the x-axis at one point,so\r<BR>\n" );
document.write( "\n" );
document.write( "(-a)^2-4(1)(3)=0 so a^2-12=0 so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=sqrt%28+12+%29 ALIGN=MIDDLE  ALT=\"a=sqrt%28+12+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > or<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=-sqrt%28+12+%29 ALIGN=MIDDLE  ALT=\"a=-sqrt%28+12+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );