SOLUTION: {{{(6-x-x^2)/(3x^2-10x+8)}}}

     

Rearrange the numerator in descending powers

     

Since the leading term is negative in the numerator,
factor out -1 first:

     

Now we factor the parentheses in the numerator 
as  and the denominator as


     

Next we cancel the 's, and
all that's left is

     

Now you can bring the negative sign out
front and erase the 1, and have:


     

and then you can erase the parentheses,
and have

     

Edwin