document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=390276>Question 390276</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w%5E4-18w%5E2-2=0 ALIGN=MIDDLE  ALT=\"w%5E4-18w%5E2-2=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #276774 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=276774\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Letting <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+w%5E2 ALIGN=MIDDLE  ALT=\"z+=+w%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, substitute:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z%5E2+-+18z+-+2+=+0 ALIGN=MIDDLE  ALT=\"z%5E2+-+18z+-+2+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "By the quadratic formula, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+%2818+%2B-+sqrt%28332%29%29%2F2+=+9+%2B-+sqrt%2883%29 ALIGN=MIDDLE  ALT=\"z+=+%2818+%2B-+sqrt%28332%29%29%2F2+=+9+%2B-+sqrt%2883%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > If <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+9+%2B+sqrt%2883%29 ALIGN=MIDDLE  ALT=\"z+=+9+%2B+sqrt%2883%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w+=+0+%2B-+sqrt%289+%2B+sqrt%2883%29%29 ALIGN=MIDDLE  ALT=\"w+=+0+%2B-+sqrt%289+%2B+sqrt%2883%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Likewise, if <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+9+-+sqrt%2883%29 ALIGN=MIDDLE  ALT=\"z+=+9+-+sqrt%2883%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w+=+0+%2B-+sqrt%289+-+sqrt%2883%29%29 ALIGN=MIDDLE  ALT=\"w+=+0+%2B-+sqrt%289+-+sqrt%2883%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > (this gives two real and two complex values for w). </SPAN>\n" );
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