document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1036785>Question 1036785</A>: <I><SPAN STYLE=\"word-break: break-all;\"> show that the straight line y=mx+b is a tangent to the curve y=-x^2-3x+4 if and only if (m+3)^2=4(b-4)\r<BR>\n" );
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document.write( "help would be much appreciated, thanks!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #651494 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=651494\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your plan to show this is examine the difference between the the two expressions as functions, like the difference as SUBTRACTION between the two functions.  The difference will be 0 for the tangency point.  You will obviously have the couple of variables in your finished equation regardless of the form you use.\r<BR>\n" );
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document.write( "The two equations cannot be graphed until values of m and b are known, given, or picked.   WAIT.  Not completely true.  You can graph the parabola but not the line.  You must have values for m and b. </SPAN>\n" );
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