Solution - Factoring binomials using the difference of squares

Reformatting the input :

Changes made to your input should not affect the solution:

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

Rearrange:

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

                     -2*x^22*x^9-(-5*x)=0 

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  (0 -  (2x22 • x9)) -  -5x  = 0 

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   5x - 2x³¹  =   -x • (2x³⁰ - 5) 

Trying to factor as a Difference of Squares :

 3.2      Factoring:  2x³⁰ - 5 

Theory : A difference of two perfect squares,  A² - B²  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =
         A² - AB + BA - B² =
         A² - AB + AB - B² =
         A² - B²

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check :  2  is not a square !!

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

Trying to factor as a Difference of Cubes:

 3.3      Factoring:  2x³⁰ - 5 

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 :  2  is not a cube !!

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

Equation at the end of step  3  :

  -x • (2x30 - 5)  = 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  :    -x = 0 

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

Solving a Single Variable Equation :

 4.3      Solve  :    2x³⁰-5 = 0 

 Add  5  to both sides of the equation : 
                      2x³⁰ = 5
Divide both sides of the equation by 2:
                     x³⁰ = 5/2 = 2.500
                     x  =  30th root of (5/2) 

 The equation has two real solutions  
 These solutions are  x = 30th root of ( 2.500) = ± 1.03101  
 

Three solutions were found :

1.  x = 30th root of ( 2.500) = ± 1.03101
2.  x = 0