(x+1)(x-1)(x^2-1)=0

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Solution for (x+1)(x-1)(x^2-1)=0 equation:


Simplifying
(x + 1)(x + -1)(x2 + -1) = 0

Reorder the terms:
(1 + x)(x + -1)(x2 + -1) = 0

Reorder the terms:
(1 + x)(-1 + x)(x2 + -1) = 0

Reorder the terms:
(1 + x)(-1 + x)(-1 + x2) = 0

Multiply (1 + x) * (-1 + x)
(1(-1 + x) + x(-1 + x))(-1 + x2) = 0
((-1 * 1 + x * 1) + x(-1 + x))(-1 + x2) = 0
((-1 + 1x) + x(-1 + x))(-1 + x2) = 0
(-1 + 1x + (-1 * x + x * x))(-1 + x2) = 0
(-1 + 1x + (-1x + x2))(-1 + x2) = 0

Combine like terms: 1x + -1x = 0
(-1 + 0 + x2)(-1 + x2) = 0
(-1 + x2)(-1 + x2) = 0

Multiply (-1 + x2) * (-1 + x2)
(-1(-1 + x2) + x2(-1 + x2)) = 0
((-1 * -1 + x2 * -1) + x2(-1 + x2)) = 0
((1 + -1x2) + x2(-1 + x2)) = 0
(1 + -1x2 + (-1 * x2 + x2 * x2)) = 0
(1 + -1x2 + (-1x2 + x4)) = 0

Combine like terms: -1x2 + -1x2 = -2x2
(1 + -2x2 + x4) = 0

Solving
1 + -2x2 + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(1 + -1x2)(1 + -1x2) = 0

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

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

Subproblem 1

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 2

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 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

Solution

x = {-1, 1, -1, 1}

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