Question 1095933
Much of what you wrote is disconnected.


You wish to factorize {{{x^2-2x-8}}}.
The constant term based on 1 and 8 will not work.  
The constant term based on 2 and 4 may work.


Fill in the necessary parts for this format for constants m and n:
<pre>(x  m)(x  n)</pre>


The factorization which will work is  {{{(x+2)(x-4)}}}, which you could check by doing the multiplication and simplifying.