Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  ((0 -  24t2) +  64t) +  80

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   -16t² + 64t + 80  =   -16 • (t² - 4t - 5) 

Trying to factor by splitting the middle term

 3.2     Factoring  t² - 4t - 5 

The first term is,  t²  its coefficient is  1 .
The middle term is,  -4t  its coefficient is  -4 .
The last term, "the constant", is  -5 

Step-1 : Multiply the coefficient of the first term by the constant   1 • -5 = -5 

Step-2 : Find two factors of  -5  whose sum equals the coefficient of the middle term, which is   -4 .

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -5  and  1 
                     t² - 5t + 1t - 5

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

Final result :

  -16 • (t + 1) • (t - 5)