8x^6+63x^3+8=0

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Solution for 8x^6+63x^3+8=0 equation:


Simplifying
8x6 + 63x3 + 8 = 0

Reorder the terms:
8 + 63x3 + 8x6 = 0

Solving
8 + 63x3 + 8x6 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
1 + 7.875x3 + x6 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 7.875x3 + -1 + x6 = 0 + -1

Reorder the terms:
1 + -1 + 7.875x3 + x6 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 7.875x3 + x6 = 0 + -1
7.875x3 + x6 = 0 + -1

Combine like terms: 0 + -1 = -1
7.875x3 + x6 = -1

The x term is 7.875x3.  Take half its coefficient (3.9375).
Square it (15.50390625) and add it to both sides.

Add '15.50390625' to each side of the equation.
7.875x3 + 15.50390625 + x6 = -1 + 15.50390625

Reorder the terms:
15.50390625 + 7.875x3 + x6 = -1 + 15.50390625

Combine like terms: -1 + 15.50390625 = 14.50390625
15.50390625 + 7.875x3 + x6 = 14.50390625

Factor a perfect square on the left side:
(x3 + 3.9375)(x3 + 3.9375) = 14.50390625

Calculate the square root of the right side: 3.808399434

Break this problem into two subproblems by setting 
(x3 + 3.9375) equal to 3.808399434 and -3.808399434.

Subproblem 1

x3 + 3.9375 = 3.808399434 Simplifying x3 + 3.9375 = 3.808399434 Reorder the terms: 3.9375 + x3 = 3.808399434 Solving 3.9375 + x3 = 3.808399434 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.9375' to each side of the equation. 3.9375 + -3.9375 + x3 = 3.808399434 + -3.9375 Combine like terms: 3.9375 + -3.9375 = 0.0000 0.0000 + x3 = 3.808399434 + -3.9375 x3 = 3.808399434 + -3.9375 Combine like terms: 3.808399434 + -3.9375 = -0.129100566 x3 = -0.129100566 Simplifying x3 = -0.129100566 Reorder the terms: 0.129100566 + x3 = -0.129100566 + 0.129100566 Combine like terms: -0.129100566 + 0.129100566 = 0.000000000 0.129100566 + 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 + 3.9375 = -3.808399434 Simplifying x3 + 3.9375 = -3.808399434 Reorder the terms: 3.9375 + x3 = -3.808399434 Solving 3.9375 + x3 = -3.808399434 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.9375' to each side of the equation. 3.9375 + -3.9375 + x3 = -3.808399434 + -3.9375 Combine like terms: 3.9375 + -3.9375 = 0.0000 0.0000 + x3 = -3.808399434 + -3.9375 x3 = -3.808399434 + -3.9375 Combine like terms: -3.808399434 + -3.9375 = -7.745899434 x3 = -7.745899434 Simplifying x3 = -7.745899434 Reorder the terms: 7.745899434 + x3 = -7.745899434 + 7.745899434 Combine like terms: -7.745899434 + 7.745899434 = 0.000000000 7.745899434 + 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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