Enter an equation or problem
Camera input is not recognized!

Solution - Linear equations with one unknown

x=root[9]36=1.4891
x=root[9]{36}=1.4891

Step by Step Solution

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 :

                     x^9-(36)=0 

Step by step solution :

Step  1  :

Trying to factor as a Difference of Cubes:

 1.1      Factoring:  x9-36 

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 :  36  is not a cube !!
Ruling : Binomial can not be factored as the difference of two perfect cubes

Polynomial Roots Calculator :

 1.2    Find roots (zeroes) of :       F(x) = x9-36
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  1  and the Trailing Constant is  -36.

 
The factor(s) are:

of the Leading Coefficient :  1
 
of the Trailing Constant :  1 ,2 ,3 ,4 ,6 ,9 ,12 ,18 ,36

 
Let us test ....

  P  Q  P/Q  F(P/Q)   Divisor
     -1     1      -1.00      -37.00   
     -2     1      -2.00      -548.00   
     -3     1      -3.00     -19719.00   
     -4     1      -4.00     -262180.00   
     -6     1      -6.00     -10077732.00   


Note - For tidiness, printing of 13 checks which found no root was suppressed

Polynomial Roots Calculator found no rational roots

Equation at the end of step  1  :

  x9 - 36  = 0 

Step  2  :

Solving a Single Variable Equation :

 2.1      Solve  :    x9-36 = 0 

 
Add  36  to both sides of the equation : 
 
                     x9 = 36
                     x  =  9th root of (36) 

 
The equation has one real solution
This solution is  x = 9th root of 36 = 1.4891

One solution was found :

                   x = 9th root of 36 = 1.4891

Why learn this

Latest Related Drills Solved