x^16-5x^8+4=

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Solution for x^16-5x^8+4= equation:


Simplifying
x16 + -5x8 + 4 = 0

Reorder the terms:
4 + -5x8 + x16 = 0

Solving
4 + -5x8 + x16 = 0

Solving for variable 'x'.

Factor a trinomial.
(1 + -1x8)(4 + -1x8) = 0

Factor a difference between two squares.
((1 + x4)(1 + -1x4))(4 + -1x8) = 0

Factor a difference between two squares.
((1 + x4)((1 + x2)(1 + -1x2)))(4 + -1x8) = 0

Factor a difference between two squares.
((1 + x4)((1 + x2)((1 + x)(1 + -1x))))(4 + -1x8) = 0

Factor a difference between two squares.
((2 + x4)(2 + -1x4))(1 + x4)(1 + x2)(1 + x)(1 + -1x) = 0

Subproblem 1

Set the factor '(1 + x4)' equal to zero and attempt to solve: Simplifying 1 + x4 = 0 Solving 1 + x4 = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x4 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x4 = 0 + -1 x4 = 0 + -1 Combine like terms: 0 + -1 = -1 x4 = -1 Simplifying x4 = -1 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(1 + x2)' equal to zero and attempt to solve: Simplifying 1 + x2 = 0 Solving 1 + x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x2 = 0 + -1 x2 = 0 + -1 Combine like terms: 0 + -1 = -1 x2 = -1 Simplifying x2 = -1 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 3

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Subproblem 4

Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1

Subproblem 5

Set the factor '(2 + x4)' equal to zero and attempt to solve: Simplifying 2 + x4 = 0 Solving 2 + x4 = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x4 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x4 = 0 + -2 x4 = 0 + -2 Combine like terms: 0 + -2 = -2 x4 = -2 Simplifying x4 = -2 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 6

Set the factor '(2 + -1x4)' equal to zero and attempt to solve: Simplifying 2 + -1x4 = 0 Solving 2 + -1x4 = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x4 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x4 = 0 + -2 -1x4 = 0 + -2 Combine like terms: 0 + -2 = -2 -1x4 = -2 Divide each side by '-1'. x4 = 2 Simplifying x4 = 2 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Solution

x = {-1, 1}

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