Question 1142484
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I came to show you how to do it correctly:



<pre>
You should apply first the rule of differentiating a product


      (uv)' = u'*v + u*v'


and then apply the chain differentiating rule :


      {{{d/(dx)}}} ((2x+5)^2*(x-4)) =  2*(2x+5)*2*(x-4) + (2x+5)^2.   <U>ANSWER</U>
</pre>


I mean : &nbsp;the &nbsp;<U>correct</U> &nbsp;answer.