document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=446870>Question 446870</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The graph of a parabola of the form y = x2 + bx + c crosses the<BR>\n" );
document.write( "y-axis at –36 and the x-axis at x = 3. At what other point does<BR>\n" );
document.write( "the graph cross the x-axis?<BR>\n" );
document.write( "A. x = –12<BR>\n" );
document.write( "B. x = –9<BR>\n" );
document.write( "C. x = 9<BR>\n" );
document.write( "D. x = 12\r<BR>\n" );
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document.write( "The answer is A but im not sure how to arrive at that?????? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #307943 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=307943\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the y-intercept (when x=0) is -36, so this must be the value of c<BR>\n" );
document.write( "___ -36 = 0^2 + b(0) + c\r<BR>\n" );
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document.write( "the x-intercept (when y=0) is 3<BR>\n" );
document.write( "___ 0 = 3^2 + 3b - 36 ___ 27 = 3b ___ 9 = b\r<BR>\n" );
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document.write( "y = x^2 + 9x - 36\r<BR>\n" );
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document.write( "factoring ___ 0 = (x + 12)(x - 3)\r<BR>\n" );
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document.write( "x - 3 = 0 ___ x = 3 ___ this was given\r<BR>\n" );
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document.write( "x + 12 = 0 ___ x = -12 </SPAN>\n" );
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