Solution - Nonlinear equations

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x8"   was replaced by   "x^8". 

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  (x2) -  (2•32x81)  = 0 
 Step  2  :
 Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   x² - 18x⁸¹  =   -x² • (18x⁷⁹ - 1) 

Equation at the end of step  3  :

  -x2 • (18x79 - 1)  = 0 

Step  4  :

Theory - Roots of a product :

 4.1    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 :

 4.2      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 :

 4.3      Solve  :    18x⁷⁹-1 = 0 

 Add  1  to both sides of the equation : 
                      18x⁷⁹ = 1
Divide both sides of the equation by 18:
                     x⁷⁹ = 1/18 = 0.056
                     x  =  79th root of (1/18) 

 The equation has one real solution
This solution is  x = 79th root of ( 0.056) = 0.96407

Two solutions were found :

1.  x = 79th root of ( 0.056) = 0.96407
2.  x = 0