document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=906423>Question 906423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A quadratic function is given.<BR>\n" );
document.write( "f(x) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++++-++x%5E2+%2B+18x+ ALIGN=MIDDLE  ALT=\"++++-++x%5E2+%2B+18x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(a) Express the quadratic function in standard form.<BR>\n" );
document.write( "f(x) = ____ <BR>\n" );
document.write( "(b) Find its vertex and its x- and y-intercept(s). (If an answer does not exist, enter DNE.)<BR>\n" );
document.write( "vertex...............(x, y) =	( _ , _ )<BR>\n" );
document.write( "x-intercepts......(x, y) =	( _ , _ ) (smaller value)<BR>\n" );
document.write( ".........................(x, y) =	( _ , _ ) (larger value)<BR>\n" );
document.write( "y-intercept........(x, y) =	( _ , _ ) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #549832 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=549832\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ve it to a better place:\r<BR>\n" );
document.write( "\n" );
document.write( "    A quadratic function is given.<BR>\n" );
document.write( "    f(x) =-x^2+18x<BR>\n" );
document.write( "    (a) Express the quadratic function in standard form.<BR>\n" );
document.write( "    f(x) =-x^2+18x<BR>\n" );
document.write( "    (b) Find its vertex and its x- and y-intercept(s).<BR>\n" );
document.write( "y=-x^2+18x<BR>\n" );
document.write( "complete the square:<BR>\n" );
document.write( "y=-(x^2-18+81)+81<BR>\n" );
document.write( "y=-(x-9)^2+81<BR>\n" );
document.write( "vertex:(9,81)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x-intercepts<BR>\n" );
document.write( "set y=0<BR>\n" );
document.write( "-x^2+18x=0<BR>\n" );
document.write( "-x(x-18)=0<BR>\n" );
document.write( "x=0<BR>\n" );
document.write( "and<BR>\n" );
document.write( "x=18<BR>\n" );
document.write( "..<BR>\n" );
document.write( "y-intercept<BR>\n" );
document.write( "set x=0<BR>\n" );
document.write( "y=x^2+18x<BR>\n" );
document.write( "y=0 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );