x^6+8x^3-5=0

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Solution for x^6+8x^3-5=0 equation:


Simplifying
x6 + 8x3 + -5 = 0

Reorder the terms:
-5 + 8x3 + x6 = 0

Solving
-5 + 8x3 + x6 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 8x3 + 5 + x6 = 0 + 5

Reorder the terms:
-5 + 5 + 8x3 + x6 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 8x3 + x6 = 0 + 5
8x3 + x6 = 0 + 5

Combine like terms: 0 + 5 = 5
8x3 + x6 = 5

The x term is 8x3.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x3 + 16 + x6 = 5 + 16

Reorder the terms:
16 + 8x3 + x6 = 5 + 16

Combine like terms: 5 + 16 = 21
16 + 8x3 + x6 = 21

Factor a perfect square on the left side:
(x3 + 4)(x3 + 4) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(x3 + 4) equal to 4.582575695 and -4.582575695.

Subproblem 1

x3 + 4 = 4.582575695 Simplifying x3 + 4 = 4.582575695 Reorder the terms: 4 + x3 = 4.582575695 Solving 4 + x3 = 4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x3 = 4.582575695 + -4 Combine like terms: 4 + -4 = 0 0 + x3 = 4.582575695 + -4 x3 = 4.582575695 + -4 Combine like terms: 4.582575695 + -4 = 0.582575695 x3 = 0.582575695 Simplifying x3 = 0.582575695 Reorder the terms: -0.582575695 + x3 = 0.582575695 + -0.582575695 Combine like terms: 0.582575695 + -0.582575695 = 0.000000000 -0.582575695 + x3 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x3 + 4 = -4.582575695 Simplifying x3 + 4 = -4.582575695 Reorder the terms: 4 + x3 = -4.582575695 Solving 4 + x3 = -4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x3 = -4.582575695 + -4 Combine like terms: 4 + -4 = 0 0 + x3 = -4.582575695 + -4 x3 = -4.582575695 + -4 Combine like terms: -4.582575695 + -4 = -8.582575695 x3 = -8.582575695 Simplifying x3 = -8.582575695 Reorder the terms: 8.582575695 + x3 = -8.582575695 + 8.582575695 Combine like terms: -8.582575695 + 8.582575695 = 0.000000000 8.582575695 + x3 = 0.000000000 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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