Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x9"   was replaced by   "x^9". 

Step  1  :

Equation at the end of step  1  :

  (16 • (x2)) -  (23•3x9)
 Step  2  :

Equation at the end of step  2  :

  24x2 -  (23•3x9)

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   16x² - 24x⁹  =   -8x² • (3x⁷ - 2) 

Polynomial Roots Calculator :

 4.2    Find roots (zeroes) of :       F(x) = 3x⁷ - 2
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  -2.

 The factor(s) are:

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

 Let us test ....

Polynomial Roots Calculator found no rational roots

Final result :

  -8x2 • (3x7 - 2)