document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=409158>Question 409158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> hi, I am solving by quadraic formula -b sqrt (b2-4ac)/(2a)\r<BR>\n" );
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document.write( "x^2+2x=168<BR>\n" );
document.write( "x^2+2x-168=168-168<BR>\n" );
document.write( "x^2+2x-168=0\r<BR>\n" );
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document.write( "-2 +- sqrt (2^2-4(1)(-168)/(2(1))<BR>\n" );
document.write( "-2 +- sqrt (4-672)/(2)<BR>\n" );
document.write( "-2 +- sqrt (668)/(2)  This is where I am lost.  It's not a perfect square, so<BR>\n" );
document.write( "                         what do I do now?  I choose factors.<BR>\n" );
document.write( "-2 +- sqrt ((4(167))/(2)<BR>\n" );
document.write( "-2 +- 2 sqrt (167)/(2)<BR>\n" );
document.write( "common denominator of 2<BR>\n" );
document.write( "-1 sqrt(167)/(2)\r<BR>\n" );
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document.write( "Would you help me understand where I went wrong and how to do it right? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #288088 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=288088\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "Sign Error:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ b^2\ -\ 4ac\ =\ 4\ -\ 4(1)(-168)\ =\ 4\ -\ (-672)\ =\ 4\ +\ 672\ =\ 676\ =\ 26^2\">\r<BR>\n" );
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document.write( "So it is a perfect square after all.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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document.write( "</font> </SPAN>\n" );
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