document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=50606>Question 50606</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the vertex of each parabola. \r<BR>\n" );
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document.write( "18. x^2 + 4x - 28y + 88 = 0 \r<BR>\n" );
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document.write( "19. x^2 - 2x + 44y + 353 = 0 \r<BR>\n" );
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document.write( "20. x^2 + 6x + 8y + 25 = 0  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #33684 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=33684\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 18. x^2 + 4x - 28y + 88 = 0 <BR>\n" );
document.write( "Rewrite as follows:<BR>\n" );
document.write( "x^2+4x+? = 28y-88+?<BR>\n" );
document.write( "Complete the square to get:<BR>\n" );
document.write( "x^2+4x+4 = 28y-88+4<BR>\n" );
document.write( "(x+2)^2 = 4(7)(y-(11/7))<BR>\n" );
document.write( "This follows the form (x-h)^2=4p(y-k)<BR>\n" );
document.write( "where (h,k) is the vertex.<BR>\n" );
document.write( "Vertex at (-2,11/7)\r<BR>\n" );
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document.write( "Follow the same procedure for #'s 19 and 20.<BR>\n" );
document.write( "19. x^2 - 2x + 44y + 353 = 0 <BR>\n" );
document.write( "20. x^2 + 6x + 8y + 25 = 0 \r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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