z^4-1=0

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Solution for z^4-1=0 equation:


Simplifying
z4 + -1 = 0

Reorder the terms:
-1 + z4 = 0

Solving
-1 + z4 = 0

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + z4 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + z4 = 0 + 1
z4 = 0 + 1

Combine like terms: 0 + 1 = 1
z4 = 1

Simplifying
z4 = 1

Reorder the terms:
-1 + z4 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + z4 = 0

Factor a difference between two squares.
(1 + z2)(-1 + z2) = 0

Factor a difference between two squares.
(1 + z2)((1 + z)(-1 + z)) = 0

Subproblem 1

Set the factor '(1 + z2)' equal to zero and attempt to solve: Simplifying 1 + z2 = 0 Solving 1 + z2 = 0 Move all terms containing z to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + z2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + z2 = 0 + -1 z2 = 0 + -1 Combine like terms: 0 + -1 = -1 z2 = -1 Simplifying z2 = -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 + z)' equal to zero and attempt to solve: Simplifying 1 + z = 0 Solving 1 + z = 0 Move all terms containing z to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + z = 0 + -1 Combine like terms: 1 + -1 = 0 0 + z = 0 + -1 z = 0 + -1 Combine like terms: 0 + -1 = -1 z = -1 Simplifying z = -1

Subproblem 3

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

Solution

z = {-1, 1}

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