document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=137938>Question 137938</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve the quadratic equation.  I Have to show whether concave up or concave down?  Thanks!\r<BR>\n" );
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document.write( "y= -(x-2)^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100798 by </B><A HREF=/tutors/aboutme.mpl?userid=dolly><B>dolly(163)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dolly><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=100798\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi,\r<BR>\n" );
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document.write( "Given y = -(x-2)^2\r<BR>\n" );
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document.write( "To show if the graph is concave up or down, you do not have to solve it necessarily.\r<BR>\n" );
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document.write( "The given equation is y = -(x^2-4x+4) [ on expansion ]<BR>\n" );
document.write( "                        = -x^2 + 4x - 4\r<BR>\n" );
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document.write( "As the quadratic term , that is x^2 term is negative, the graph is concave down.\r<BR>\n" );
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document.write( "Positive implies concave up and negative concave down.\r<BR>\n" );
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document.write( "Hope it is clear.\r<BR>\n" );
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document.write( "dolly </SPAN>\n" );
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