document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=131835>Question 131835</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you solve this so I can understand f(x)=-2x^2+2x+6 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #96256 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=96256\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x)=-2x^2+2x+6<BR>\n" );
document.write( "-2(x^2-x-3)<BR>\n" );
document.write( "To find the zeroes:<BR>\n" );
document.write( "x^2-x-3=0<BR>\n" );
document.write( "x^2-x  =3<BR>\n" );
document.write( "x^2-x+ 1/4=3+ 1/4 complete the square by taking 1/2 the middle term and squaring it.<BR>\n" );
document.write( "(x- 1/2)^2=13/4<BR>\n" );
document.write( "x- 1/2=+-sqrt(13)/2 sqrt of each side.<BR>\n" );
document.write( "x=1/2+-sqrt(13)/2<BR>\n" );
document.write( "x=(1+sqrt(13))/2, (1-sqrt(13))/2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "The 2 places the graph crosses the x axis (the x intercepts[where y=0]) also give the answer.<BR>\n" );
document.write( "You could also use the quadratic equation.<BR>\n" );
document.write( "Ed<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C-2x%5E2%2B2x%2B6%29 ALIGN=MIDDLE  ALT=\"graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C-2x%5E2%2B2x%2B6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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