document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=342241>Question 342241</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the quadratic formula to solve the equation for x in terms of y.?<BR>\n" );
document.write( "2x^2 + 9xy -5 - y^2 = 0\r<BR>\n" );
document.write( "\n" );
document.write( "This is what I did:<BR>\n" );
document.write( "(2)x^2 + (9y)x + (-y^2-5) = 0<BR>\n" );
document.write( "-9y +/- square root: 9y^2 -4(2)(-y^2-5) / 4<BR>\n" );
document.write( "-9y +/- square root: 9y^2 + 8y^2 +40/ 4<BR>\n" );
document.write( "-9y +/- square root : 17y^2 +40/ 4\r<BR>\n" );
document.write( "\n" );
document.write( "Why is this answer wrong? Please explain. Thanks!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #244972 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=244972\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-9y+%2B-+sqrt%28+%289y%29%5E2-4%2A2%2A%28-%285%2By%5E2%29%29%29%29+%2F%282%2A2%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-9y+%2B-+sqrt%28+%289y%29%5E2-4%2A2%2A%28-%285%2By%5E2%29%29%29%29+%2F%282%2A2%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "You didn't square the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9y ALIGN=MIDDLE  ALT=\"9y\"   DISABLED_style= \"max-width:90%; height:auto;\" > term correctly. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-9y+%2B-+sqrt%28+81y%5E2%2B%2840%2B8y%5E2%29%29%29+%2F4+ ALIGN=MIDDLE  ALT=\"x+=+%28-9y+%2B-+sqrt%28+81y%5E2%2B%2840%2B8y%5E2%29%29%29+%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-9y+%2B-+sqrt%28+89y%5E2%2B40%29%29+%2F4+ ALIGN=MIDDLE  ALT=\"x+=+%28-9y+%2B-+sqrt%28+89y%5E2%2B40%29%29+%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );