Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (24y2 -  56y) +  49

Step  2  :

Trying to factor by splitting the middle term

 2.1     Factoring  16y²-56y+49 

The first term is,  16y²  its coefficient is  16 .
The middle term is,  -56y  its coefficient is  -56 .
The last term, "the constant", is  +49 

Step-1 : Multiply the coefficient of the first term by the constant   16 • 49 = 784 

Step-2 : Find two factors of  784  whose sum equals the coefficient of the middle term, which is   -56 .

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -28  and  -28 
                     16y² - 28y - 28y - 49

Step-4 : Add up the first 2 terms, pulling out like factors :
                    4y • (4y-7)
              Add up the last 2 terms, pulling out common factors :
                    7 • (4y-7)
Step-5 : Add up the four terms of step 4 :
                    (4y-7)  •  (4y-7)
             Which is the desired factorization

Multiplying Exponential Expressions :

 2.2    Multiply  (4y-7)  by  (4y-7) 

The rule says : To multiply exponential expressions which have the same base, add up their exponents.

In our case, the common base is  (4y-7)  and the exponents are :
          1 , as  (4y-7)  is the same number as  (4y-7)¹ 
 and   1 , as  (4y-7)  is the same number as  (4y-7)¹ 
The product is therefore,  (4y-7)⁽¹⁺¹⁾ = (4y-7)² 

Final result :

  (4y - 7)2