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Solution - Simplification or other simple results

6x31
6x^3-1

Step by Step Solution

Step  1  :

Equation at the end of step  1  :

  ((2•3x2) • x) -  1

Step  2  :

Trying to factor as a Difference of Cubes:

 2.1      Factoring:  6x3-1 

Theory : A difference of two perfect cubes,  a3 - b3 can be factored into
              (a-b) • (a2 +ab +b2)

Proof :  (a-b)•(a2+ab+b2) =
            a3+a2b+ab2-ba2-b2a-b3 =
            a3+(a2b-ba2)+(ab2-b2a)-b3 =
            a3+0+0-b3 =
            a3-b3


Check :  6  is not a cube !!

Ruling : Binomial can not be factored as the difference of two perfect cubes

Polynomial Roots Calculator :

 2.2    Find roots (zeroes) of :       F(x) = 6x3-1
Polynomial Roots Calculator is a set of methods aimed at finding values of  x  for which   F(x)=0  

Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers  x  which can be expressed as the quotient of two integers

The Rational Root Theorem states that if a polynomial zeroes for a rational number  P/Q   then  P  is a factor of the Trailing Constant and  Q  is a factor of the Leading Coefficient

In this case, the Leading Coefficient is  6  and the Trailing Constant is  -1.

 
The factor(s) are:

of the Leading Coefficient :  1,2 ,3 ,6
 
of the Trailing Constant :  1

 
Let us test ....

  P  Q  P/Q  F(P/Q)   Divisor
     -1     1      -1.00      -7.00   
     -1     2      -0.50      -1.75   
     -1     3      -0.33      -1.22   
     -1     6      -0.17      -1.03   
     1     1      1.00      5.00   
     1     2      0.50      -0.25   
     1     3      0.33      -0.78   
     1     6      0.17      -0.97   


Polynomial Roots Calculator found no rational roots

Final result :

  6x3 - 1

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