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x^6-(2*x-1)^3=0 equation

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Numerical solution:

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The solution

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 6            3    
x  - (2*x - 1)  = 0
$$x^{6} - \left(2 x - 1\right)^{3} = 0$$
The graph
Rapid solution [src]
x1 = 1
$$x_{1} = 1$$
             /    ___     ___ 4 ___\     ___ 4 ___
       1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 
x2 = - - + I*|- ----- - -----------| - -----------
       2     \    2          2     /        2     
$$x_{2} = - \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{\sqrt{3}}{2}\right)$$
             /  ___     ___ 4 ___\     ___ 4 ___
       1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 
x3 = - - + I*|----- - -----------| + -----------
       2     \  2          2     /        2     
$$x_{3} = - \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} + \frac{\sqrt{3}}{2}\right)$$
             /    ___     ___ 4 ___\     ___ 4 ___
       1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 
x4 = - - + I*|- ----- + -----------| + -----------
       2     \    2          2     /        2     
$$x_{4} = - \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)$$
             /  ___     ___ 4 ___\     ___ 4 ___
       1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 
x5 = - - + I*|----- + -----------| - -----------
       2     \  2          2     /        2     
$$x_{5} = - \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(\frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)$$
x5 = -sqrt(2)*3^(1/4)/2 - 1/2 + i*(sqrt(3)/2 + sqrt(2)*3^(1/4)/2)
Sum and product of roots [src]
sum
            /    ___     ___ 4 ___\     ___ 4 ___           /  ___     ___ 4 ___\     ___ 4 ___           /    ___     ___ 4 ___\     ___ 4 ___           /  ___     ___ 4 ___\     ___ 4 ___
      1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3      1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3      1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3      1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 
1 + - - + I*|- ----- - -----------| - ----------- + - - + I*|----- - -----------| + ----------- + - - + I*|- ----- + -----------| + ----------- + - - + I*|----- + -----------| - -----------
      2     \    2          2     /        2          2     \  2          2     /        2          2     \    2          2     /        2          2     \  2          2     /        2     
$$\left(\left(\left(1 + \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{\sqrt{3}}{2}\right)\right)\right) + \left(- \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} + \frac{\sqrt{3}}{2}\right)\right)\right) + \left(- \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)\right)\right) + \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(\frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)\right)$$
=
       /  ___     ___ 4 ___\     /  ___     ___ 4 ___\     /    ___     ___ 4 ___\     /    ___     ___ 4 ___\
       |\/ 3    \/ 2 *\/ 3 |     |\/ 3    \/ 2 *\/ 3 |     |  \/ 3    \/ 2 *\/ 3 |     |  \/ 3    \/ 2 *\/ 3 |
-1 + I*|----- + -----------| + I*|----- - -----------| + I*|- ----- + -----------| + I*|- ----- - -----------|
       \  2          2     /     \  2          2     /     \    2          2     /     \    2          2     /
$$-1 + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{\sqrt{3}}{2}\right) + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} + \frac{\sqrt{3}}{2}\right) + i \left(- \frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right) + i \left(\frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)$$
product
/        /    ___     ___ 4 ___\     ___ 4 ___\ /        /  ___     ___ 4 ___\     ___ 4 ___\ /        /    ___     ___ 4 ___\     ___ 4 ___\ /        /  ___     ___ 4 ___\     ___ 4 ___\
|  1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 | |  1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 | |  1     |  \/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 | |  1     |\/ 3    \/ 2 *\/ 3 |   \/ 2 *\/ 3 |
|- - + I*|- ----- - -----------| - -----------|*|- - + I*|----- - -----------| + -----------|*|- - + I*|- ----- + -----------| + -----------|*|- - + I*|----- + -----------| - -----------|
\  2     \    2          2     /        2     / \  2     \  2          2     /        2     / \  2     \    2          2     /        2     / \  2     \  2          2     /        2     /
$$\left(- \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} + \frac{\sqrt{3}}{2}\right)\right) \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{\sqrt{3}}{2}\right)\right) \left(- \frac{1}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2} + i \left(- \frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)\right) \left(- \frac{\sqrt{2} \sqrt[4]{3}}{2} - \frac{1}{2} + i \left(\frac{\sqrt{3}}{2} + \frac{\sqrt{2} \sqrt[4]{3}}{2}\right)\right)$$
=
1
$$1$$
1
Numerical answer [src]
x1 = 0.4306048591021 - 0.0645794553176609*i
x2 = -1.4306048591021 + 1.79663026288654*i
x3 = 1.0
x4 = -1.4306048591021 - 1.79663026288654*i
x5 = 0.4306048591021 + 0.0645794553176609*i
x5 = 0.4306048591021 + 0.0645794553176609*i