document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1038132>Question 1038132</A>: <I><SPAN STYLE=\"word-break: break-all;\"> equation of a parabola with a focus of (0,3) and a directrix of y=-3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #652861 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=652861\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> equation of a parabola with a focus of (0,3) and a directrix of y=-3<BR>\n" );
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document.write( "All points on the parabola are equidistant from (0,3) the y = -3<BR>\n" );
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document.write( "For point (x,y)<BR>\n" );
document.write( "d = sqrt((y-3)^2 + x^2) = y+3<BR>\n" );
document.write( "Square both sides<BR>\n" );
document.write( "(y-3)^2 + x^2 = y^2 + 6y + 9<BR>\n" );
document.write( "y^2-6y+9 + x^2 = y^2+6y+9<BR>\n" );
document.write( "x^2 = 12y<BR>\n" );
document.write( "y = x^2/12<BR>\n" );
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