Solution - Nonlinear equations

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x2"   was replaced by   "x^2". 

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                     2*x^2-12*x^23-(x^2)=0 

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  ((2 • (x2)) -  (22•3x23)) -  x2  = 0 
 Step  2  :

Equation at the end of step  2  :

  (2x2 -  (22•3x23)) -  x2  = 0 

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   x² - 12x²³  =   -x² • (12x²¹ - 1) 

Trying to factor as a Difference of Cubes:

 4.2      Factoring:  12x²¹ - 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 :  12  is not a cube !!

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

Equation at the end of step  4  :

  -x2 • (12x21 - 1)  = 0 

Step  5  :

Theory - Roots of a product :

 5.1    A product of several terms equals zero. 

 When a product of two or more terms equals zero, then at least one of the terms must be zero. 

 We shall now solve each term = 0 separately 

 In other words, we are going to solve as many equations as there are terms in the product 

 Any solution of term = 0 solves product = 0 as well.

Solving a Single Variable Equation :

 5.2      Solve  :    -x² = 0 

 Multiply both sides of the equation by (-1) :  x² = 0


 
 When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  
                      x  =  ± √ 0  

 Any root of zero is zero. This equation has one solution which is  x = 0

Solving a Single Variable Equation :

 5.3      Solve  :    12x²¹-1 = 0 

 Add  1  to both sides of the equation : 
                      12x²¹ = 1
Divide both sides of the equation by 12:
                     x²¹ = 1/12 = 0.083
                     x  =  21st root of (1/12) 

 The equation has one real solution
This solution is  x = 21st root of ( 0.083) = 0.88840

Two solutions were found :

1.  x = 21st root of ( 0.083) = 0.88840
2.  x = 0