Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  ((2•3x2) -  2x) -  8

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   6x² - 2x - 8  =   2 • (3x² - x - 4) 

Trying to factor by splitting the middle term

 3.2     Factoring  3x² - x - 4 

The first term is,  3x²  its coefficient is  3 .
The middle term is,  -x  its coefficient is  -1 .
The last term, "the constant", is  -4 

Step-1 : Multiply the coefficient of the first term by the constant   3 • -4 = -12 

Step-2 : Find two factors of  -12  whose sum equals the coefficient of the middle term, which is   -1 .

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -4  and  3 
                     3x² - 4x + 3x - 4

Step-4 : Add up the first 2 terms, pulling out like factors :
                    x • (3x-4)
              Add up the last 2 terms, pulling out common factors :
                     1 • (3x-4)
Step-5 : Add up the four terms of step 4 :
                    (x+1)  •  (3x-4)
             Which is the desired factorization

Final result :

  2 • (3x - 4) • (x + 1)