Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (3y2 -  y) -  30

Step  2  :

Trying to factor by splitting the middle term

 2.1     Factoring  3y²-y-30 

The first term is,  3y²  its coefficient is  3 .
The middle term is,  -y  its coefficient is  -1 .
The last term, "the constant", is  -30 

Step-1 : Multiply the coefficient of the first term by the constant   3 • -30 = -90 

Step-2 : Find two factors of  -90  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,  -10  and  9 
                     3y² - 10y + 9y - 30

Step-4 : Add up the first 2 terms, pulling out like factors :
                    y • (3y-10)
              Add up the last 2 terms, pulling out common factors :
                    3 • (3y-10)
Step-5 : Add up the four terms of step 4 :
                    (y+3)  •  (3y-10)
             Which is the desired factorization

Final result :

  (3y - 10) • (y + 3)