x^6-54x^3-27=0

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Solution for x^6-54x^3-27=0 equation:


Simplifying
x6 + -54x3 + -27 = 0

Reorder the terms:
-27 + -54x3 + x6 = 0

Solving
-27 + -54x3 + x6 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -54x3 + 27 + x6 = 0 + 27

Reorder the terms:
-27 + 27 + -54x3 + x6 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -54x3 + x6 = 0 + 27
-54x3 + x6 = 0 + 27

Combine like terms: 0 + 27 = 27
-54x3 + x6 = 27

The x term is -54x3.  Take half its coefficient (-27).
Square it (729) and add it to both sides.

Add '729' to each side of the equation.
-54x3 + 729 + x6 = 27 + 729

Reorder the terms:
729 + -54x3 + x6 = 27 + 729

Combine like terms: 27 + 729 = 756
729 + -54x3 + x6 = 756

Factor a perfect square on the left side:
(x3 + -27)(x3 + -27) = 756

Calculate the square root of the right side: 27.49545417

Break this problem into two subproblems by setting 
(x3 + -27) equal to 27.49545417 and -27.49545417.

Subproblem 1

x3 + -27 = 27.49545417 Simplifying x3 + -27 = 27.49545417 Reorder the terms: -27 + x3 = 27.49545417 Solving -27 + x3 = 27.49545417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + x3 = 27.49545417 + 27 Combine like terms: -27 + 27 = 0 0 + x3 = 27.49545417 + 27 x3 = 27.49545417 + 27 Combine like terms: 27.49545417 + 27 = 54.49545417 x3 = 54.49545417 Simplifying x3 = 54.49545417 Reorder the terms: -54.49545417 + x3 = 54.49545417 + -54.49545417 Combine like terms: 54.49545417 + -54.49545417 = 0.00000000 -54.49545417 + x3 = 0.00000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x3 + -27 = -27.49545417 Simplifying x3 + -27 = -27.49545417 Reorder the terms: -27 + x3 = -27.49545417 Solving -27 + x3 = -27.49545417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + x3 = -27.49545417 + 27 Combine like terms: -27 + 27 = 0 0 + x3 = -27.49545417 + 27 x3 = -27.49545417 + 27 Combine like terms: -27.49545417 + 27 = -0.49545417 x3 = -0.49545417 Simplifying x3 = -0.49545417 Reorder the terms: 0.49545417 + x3 = -0.49545417 + 0.49545417 Combine like terms: -0.49545417 + 0.49545417 = 0.00000000 0.49545417 + x3 = 0.00000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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