Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (3x2 -  8x) -  3

Step  2  :

Trying to factor by splitting the middle term

 2.1     Factoring  3x²-8x-3 

The first term is,  3x²  its coefficient is  3 .
The middle term is,  -8x  its coefficient is  -8 .
The last term, "the constant", is  -3 

Step-1 : Multiply the coefficient of the first term by the constant   3 • -3 = -9 

Step-2 : Find two factors of  -9  whose sum equals the coefficient of the middle term, which is   -8 .

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -9  and  1 
                     3x² - 9x + 1x - 3

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

Final result :

  (x - 3) • (3x + 1)