document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=33451>Question 33451</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many X-intercepts does the parabola have? Does its vertex lie above below or on the X-axis?\r<BR>\n" );
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document.write( "Can some help me solve?\r<BR>\n" );
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document.write( "Y=-X^2+2X-1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #19813 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=19813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The determinant = b^2-4C<BR>\n" );
document.write( "= (4-4/-2=0<BR>\n" );
document.write( "The parabola touches the x-axis at one point, x=1<BR>\n" );
document.write( "You can see this if you factor:<BR>\n" );
document.write( "y=-(x^2-2x+1)<BR>\n" );
document.write( "y=-(x-1)^2<BR>\n" );
document.write( "y will be zero when x=1<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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