28x^6-64x^3+7=0

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Solution for 28x^6-64x^3+7=0 equation:


Simplifying
28x6 + -64x3 + 7 = 0

Reorder the terms:
7 + -64x3 + 28x6 = 0

Solving
7 + -64x3 + 28x6 = 0

Solving for variable 'x'.

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

Divide each side by '28'.
0.25 + -2.285714286x3 + x6 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -2.285714286x3 + -0.25 + x6 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -2.285714286x3 + x6 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -2.285714286x3 + x6 = 0 + -0.25
-2.285714286x3 + x6 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-2.285714286x3 + x6 = -0.25

The x term is -2.285714286x3.  Take half its coefficient (-1.142857143).
Square it (1.306122449) and add it to both sides.

Add '1.306122449' to each side of the equation.
-2.285714286x3 + 1.306122449 + x6 = -0.25 + 1.306122449

Reorder the terms:
1.306122449 + -2.285714286x3 + x6 = -0.25 + 1.306122449

Combine like terms: -0.25 + 1.306122449 = 1.056122449
1.306122449 + -2.285714286x3 + x6 = 1.056122449

Factor a perfect square on the left side:
(x3 + -1.142857143)(x3 + -1.142857143) = 1.056122449

Calculate the square root of the right side: 1.027678184

Break this problem into two subproblems by setting 
(x3 + -1.142857143) equal to 1.027678184 and -1.027678184.

Subproblem 1

x3 + -1.142857143 = 1.027678184 Simplifying x3 + -1.142857143 = 1.027678184 Reorder the terms: -1.142857143 + x3 = 1.027678184 Solving -1.142857143 + x3 = 1.027678184 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.142857143' to each side of the equation. -1.142857143 + 1.142857143 + x3 = 1.027678184 + 1.142857143 Combine like terms: -1.142857143 + 1.142857143 = 0.000000000 0.000000000 + x3 = 1.027678184 + 1.142857143 x3 = 1.027678184 + 1.142857143 Combine like terms: 1.027678184 + 1.142857143 = 2.170535327 x3 = 2.170535327 Simplifying x3 = 2.170535327 Reorder the terms: -2.170535327 + x3 = 2.170535327 + -2.170535327 Combine like terms: 2.170535327 + -2.170535327 = 0.000000000 -2.170535327 + 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 + -1.142857143 = -1.027678184 Simplifying x3 + -1.142857143 = -1.027678184 Reorder the terms: -1.142857143 + x3 = -1.027678184 Solving -1.142857143 + x3 = -1.027678184 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.142857143' to each side of the equation. -1.142857143 + 1.142857143 + x3 = -1.027678184 + 1.142857143 Combine like terms: -1.142857143 + 1.142857143 = 0.000000000 0.000000000 + x3 = -1.027678184 + 1.142857143 x3 = -1.027678184 + 1.142857143 Combine like terms: -1.027678184 + 1.142857143 = 0.115178959 x3 = 0.115178959 Simplifying x3 = 0.115178959 Reorder the terms: -0.115178959 + x3 = 0.115178959 + -0.115178959 Combine like terms: 0.115178959 + -0.115178959 = 0.000000000 -0.115178959 + 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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