16x^8+15x^4=1

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Solution for 16x^8+15x^4=1 equation:


Simplifying
16x8 + 15x4 = 1

Reorder the terms:
15x4 + 16x8 = 1

Solving
15x4 + 16x8 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 15x4 + 16x8 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 15x4 + 16x8 = 0

Factor a trinomial.
(-1 + -1x4)(1 + -16x4) = 0

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

Factor a difference between two squares.
(-1 + -1x4)((1 + 4x2)((1 + 2x)(1 + -2x))) = 0

Subproblem 1

Set the factor '(-1 + -1x4)' equal to zero and attempt to solve: Simplifying -1 + -1x4 = 0 Solving -1 + -1x4 = 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 + -1x4 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x4 = 0 + 1 -1x4 = 0 + 1 Combine like terms: 0 + 1 = 1 -1x4 = 1 Divide each side by '-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 + 4x2)' equal to zero and attempt to solve: Simplifying 1 + 4x2 = 0 Solving 1 + 4x2 = 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 + 4x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 4x2 = 0 + -1 4x2 = 0 + -1 Combine like terms: 0 + -1 = -1 4x2 = -1 Divide each side by '4'. x2 = -0.25 Simplifying x2 = -0.25 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 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 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 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5

Subproblem 4

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 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 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Solution

x = {-0.5, 0.5}

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