document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867542>Question 867542</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an equation of a parabola with<BR>\n" );
document.write( "a) focus (5,0) and directrix x = -5<BR>\n" );
document.write( "b) focus (0,-7) and directrix y = 7\r<BR>\n" );
document.write( "\n" );
document.write( "Can you please help me out? Thanks so much in advance:)\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #523103 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=523103\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I suggest using Distance Formula for this one and your other request post.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Use the definition for a parabola.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Unknown set of points, (x,y).<BR>\n" );
document.write( "For question (a) of this posting,<BR>\n" );
document.write( "The set of directrix points, a line, is (-5,y).<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%28x-5%29%5E2%2B%28y-0%29%5E2%29=sqrt%28%28x-%28-5%29%29%5E2%2B%28y-y%29%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%28%28x-5%29%5E2%2B%28y-0%29%5E2%29=sqrt%28%28x-%28-5%29%29%5E2%2B%28y-y%29%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%28x-5%29%5E2%2By%5E2%29=sqrt%28%28x%2B5%29%5E2%2B0%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%28%28x-5%29%5E2%2By%5E2%29=sqrt%28%28x%2B5%29%5E2%2B0%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%28x-5%29%5E2%2By%5E2%29=sqrt%28%28x%2B5%29%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%28%28x-5%29%5E2%2By%5E2%29=sqrt%28%28x%2B5%29%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Square both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-5%29%5E2%2By%5E2=%28x%2B5%29%5E2 ALIGN=MIDDLE  ALT=\"%28x-5%29%5E2%2By%5E2=%28x%2B5%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You might not know by looking at it, but here, the x^2 terms will disappear.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-10x%2B25%2By%5E2=x%5E2%2B10x%2B25 ALIGN=MIDDLE  ALT=\"x%5E2-10x%2B25%2By%5E2=x%5E2%2B10x%2B25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10x%2B25%2By%5E2=10x%2B25 ALIGN=MIDDLE  ALT=\"-10x%2B25%2By%5E2=10x%2B25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-20x%2B25%2By%5E2=25 ALIGN=MIDDLE  ALT=\"-20x%2B25%2By%5E2=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-20x%2By%5E2=25 ALIGN=MIDDLE  ALT=\"-20x%2By%5E2=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-20x=-y%5E2%2B25 ALIGN=MIDDLE  ALT=\"-20x=-y%5E2%2B25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20x=y%5E2-25 ALIGN=MIDDLE  ALT=\"20x=y%5E2-25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%281%2F20%29y%5E2-25%2F20 ALIGN=MIDDLE  ALT=\"x=%281%2F20%29y%5E2-25%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=%281%2F20%29y%5E2-5%2F4%29 ALIGN=MIDDLE  ALT=\"highlight%28x=%281%2F20%29y%5E2-5%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );