document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287712>Question 287712</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the distance formula to find the equation of a parabola with focus F(4,0) and directrix x= -3. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208480 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=208480\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the distance formula to find the equation of a parabola with focus F(4,0) and directrix x= -3.<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "Find the equation relating to all points (x,y)<BR>\n" );
document.write( "that are equidistance from (4,0) and (-3,y).<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "sqrt[(x-4)^2 + y^2] = sqrt[(x+3)^2 + 0]<BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "x^2-8x+16 + y^2 = x^2+6x+9<BR>\n" );
document.write( "-8x + 16 + y^2 = 6x+9<BR>\n" );
document.write( "-14x + y^2 = -7<BR>\n" );
document.write( "14x = y^2 + 7<BR>\n" );
document.write( "x = (1/14)y^2 + (1/2)<BR>\n" );
document.write( "===========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );