document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=996378>Question 996378</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In the xy-plane, if the parabola with equation y=axsquared+bx+c, where a, b, and c are constants, passes through the point (-1,1), which of the following must be true?<BR>\n" );
document.write( "A) a-b=1<BR>\n" );
document.write( "B) -b+c=1<BR>\n" );
document.write( "C) a+b+c=1<BR>\n" );
document.write( "D) a-b+c=1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #614857 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52787)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=614857\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "You are given that the polynomial &nbsp;y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2+%2B+bx+%2B+c ALIGN=MIDDLE  ALT=\"ax%5E2+%2B+bx+%2B+c\"   DISABLED_style= \"max-width:90%; height:auto;\" > &nbsp;has the value &nbsp;y=1 &nbsp;at &nbsp;x=-1.\r<BR>\n" );
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document.write( "It means that &nbsp;(substitute this value of &nbsp;x=-1 &nbsp;into the polynomial) \r<BR>\n" );
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document.write( "1 = y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2A%28-1%29%5E2+%2B+b%2A%28-1%29+%2B+c ALIGN=MIDDLE  ALT=\"a%2A%28-1%29%5E2+%2B+b%2A%28-1%29+%2B+c\"   DISABLED_style= \"max-width:90%; height:auto;\" > = a*1 -b + c = a - b + c.\r<BR>\n" );
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document.write( "Again: &nbsp;&nbsp;a - b + c = 1.\r<BR>\n" );
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document.write( "It is case &nbsp;D).\r<BR>\n" );
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