document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=813137>Question 813137</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the vertex, focus, and directrix of the parabola.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F2%29x%5E2%2B2x=2y%2B4 ALIGN=MIDDLE  ALT=\"%281%2F2%29x%5E2%2B2x=2y%2B4\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #489699 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=489699\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1/2)x^2 + 2x = 2y + 4<BR>\n" );
document.write( "(1/2)x^2 + 2x - 4 = 2y<BR>\n" );
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document.write( "y = (1/4)x^2 + x - 2<BR>\n" );
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document.write( "the above quadratic equation is in standard form, with a=1/4=0.25, b=1, and c=-2<BR>\n" );
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document.write( "to solve the quadratic equation, plug this:<BR>\n" );
document.write( "0.25 1 -2<BR>\n" );
document.write( "into this: https://sooeet.com/math/quadratic-equation-solver.php<BR>\n" );
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document.write( "Answer 1:<BR>\n" );
document.write( "the vertex of the parabola is a minimum point at: ( -2, -3 )<BR>\n" );
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document.write( "Answer 2:<BR>\n" );
document.write( "the parabola has a focus at: ( -2, -2 )<BR>\n" );
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document.write( "Answer 3:<BR>\n" );
document.write( "the parabola has a directrix at: y = -4<BR>\n" );
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document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
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document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
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document.write( "Convert fractions, decimals, and percents:<BR>\n" );
document.write( "https://sooeet.com/math/fraction-decimal-percent.php<BR>\n" );
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document.write( "Calculate and graph the linear regression of any data set:<BR>\n" );
document.write( "https://sooeet.com/math/linear-regression.php </SPAN>\n" );
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