Question 985624
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Synthetic division.
<pre>
   -----------------------
4  | 1   -6    5    12
          4   -8   -12
   -----------------------
     1   -2   -3     0
</pre>
The remainder is zero, so yes, *[tex \Large x\ -\ 4] is a factor of *[tex \Large P(x)]


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \