document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=110077>Question 110077</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve and check:\r<BR>\n" );
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document.write( "0=x^2-2x-1\r<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 #80203 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=80203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "solve:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=x%5E2-2x-1 ALIGN=MIDDLE  ALT=\"0=x%5E2-2x-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........cannot be factored<BR>\n" );
document.write( "solve using quadratic formula:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%2C2%5D=%28-b+%2B-+sqrt+%28b%5E2+-4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29 ALIGN=MIDDLE  ALT=\"x%5B1%2C2%5D=%28-b+%2B-+sqrt+%28b%5E2+-4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%2C2%5D=%28-%28-2%29+%2B-+sqrt+%28%28-2%29%5E2+-4%2A1%2A%28-1%29+%29%29+%2F+%282%2A1%29 ALIGN=MIDDLE  ALT=\"x%5B1%2C2%5D=%28-%28-2%29+%2B-+sqrt+%28%28-2%29%5E2+-4%2A1%2A%28-1%29+%29%29+%2F+%282%2A1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%2C2%5D=%282+%2B-+sqrt+%284+%2B+4+%29%29+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B1%2C2%5D=%282+%2B-+sqrt+%284+%2B+4+%29%29+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%2C2%5D=%282+%2B-+sqrt+%288%29%29+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B1%2C2%5D=%282+%2B-+sqrt+%288%29%29+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%2C2%5D=%282+%2B-+2.83%29+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B1%2C2%5D=%282+%2B-+2.83%29+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D=%282+%2B+2.83%29+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B1%5D=%282+%2B+2.83%29+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D=4.83+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B1%5D=4.83+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D=%282.42%29+ ALIGN=MIDDLE  ALT=\"x%5B1%5D=%282.42%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D=%282+-+2.83%29+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B2%5D=%282+-+2.83%29+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D=+-.83+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B2%5D=+-.83+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D=+-.42+%2F+2 ALIGN=MIDDLE  ALT=\"x%5B2%5D=+-.42+%2F+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "check:\r<BR>\n" );
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document.write( "if <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+2.42 ALIGN=MIDDLE  ALT=\"x=+2.42\"   DISABLED_style= \"max-width:90%; height:auto;\" >,then <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=x%5E2-2x-1+=%282.42%29%5E2-2%2A%282.42%29-1+=+5.8564+-+4.84+-+1=+1.01+-+1+=+0+ ALIGN=MIDDLE  ALT=\"0=x%5E2-2x-1+=%282.42%29%5E2-2%2A%282.42%29-1+=+5.8564+-+4.84+-+1=+1.01+-+1+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" >..\r<BR>\n" );
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document.write( "if <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+.+42 ALIGN=MIDDLE  ALT=\"x=+.+42\"   DISABLED_style= \"max-width:90%; height:auto;\" >,then \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=%28-.42%29%5E2+-+2%2A%28-.42%29-1+=+0.1764+%2B+.84+-+1=++1.01+-+1+=+0 ALIGN=MIDDLE  ALT=\"0=%28-.42%29%5E2+-+2%2A%28-.42%29-1+=+0.1764+%2B+.84+-+1=++1.01+-+1+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >..\r<BR>\n" );
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