Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  28 +  (3•7x2)

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   21x² + 28  =   7 • (3x² + 4) 

Polynomial Roots Calculator :

 3.2    Find roots (zeroes) of :       F(x) = 3x² + 4
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  3  and the Trailing Constant is  4.

 The factor(s) are:

of the Leading Coefficient :  1,3
 of the Trailing Constant :  1 ,2 ,4

 Let us test ....

Polynomial Roots Calculator found no rational roots

Final result :

  7 • (3x2 + 4)