document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1923>Question 1923</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x^2-5x-7<0<BR>\n" );
document.write( "Help!<BR>\n" );
document.write( ":) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #743 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=743\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> easy...do not be scared of inequalities.\r<BR>\n" );
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document.write( "Solve <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-5x-7=0 ALIGN=MIDDLE  ALT=\"x%5E2-5x-7=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "You cannot factorise this, so use the formula..see my recent answers on this method.\r<BR>\n" );
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document.write( "Answers here are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%285%2Bsqrt%2853%29%29%2F%282%29 ALIGN=MIDDLE  ALT=\"x+=+%285%2Bsqrt%2853%29%29%2F%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%285-sqrt%2853%29%29%2F%282%29 ALIGN=MIDDLE  ALT=\"x+=+%285-sqrt%2853%29%29%2F%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. These are called the roots of the equation. Note the \"5+\" answer is a bigger number than the \"5-\" number.\r<BR>\n" );
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document.write( "Now, any +x^2 graph is u-shaped and I have just found where it crosses the x-axis, so where will the curve have negative values? Well, any x value between these 2 root values (just sketch a u-shaped curve that cuts the x-axis to see what i mean, so this is your inequality answer.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285-sqrt%2853%29%29%2F%282%29 ALIGN=MIDDLE  ALT=\"%285-sqrt%2853%29%29%2F%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > < x < <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%2Bsqrt%2853%29%29%2F%282%29 ALIGN=MIDDLE  ALT=\"%285%2Bsqrt%2853%29%29%2F%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Hope this makes sense.\r<BR>\n" );
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document.write( "cheers<BR>\n" );
document.write( "Jon. </SPAN>\n" );
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