Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (2•32a2) -  32

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   18a² - 32  =   2 • (9a² - 16) 

Trying to factor as a Difference of Squares :

 3.2      Factoring:  9a² - 16 

Theory : A difference of two perfect squares,  A² - B²  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =
         A² - AB + BA - B² =
         A² - AB + AB - B² =
         A² - B²

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check :  9  is the square of  3 
Check : 16 is the square of 4
Check :  a²  is the square of  a¹ 

Factorization is :       (3a + 4)  •  (3a - 4) 

Final result :

  2 • (3a + 4) • (3a - 4)