x^4=-x^2+2

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Solution for x^4=-x^2+2 equation:


Simplifying
x4 = -1x2 + 2

Reorder the terms:
x4 = 2 + -1x2

Solving
x4 = 2 + -1x2

Solving for variable 'x'.

Reorder the terms:
-2 + x2 + x4 = 2 + -1x2 + -2 + x2

Reorder the terms:
-2 + x2 + x4 = 2 + -2 + -1x2 + x2

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

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

Factor a trinomial.
(-2 + -1x2)(1 + -1x2) = 0

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

Subproblem 1

Set the factor '(-2 + -1x2)' equal to zero and attempt to solve: Simplifying -2 + -1x2 = 0 Solving -2 + -1x2 = 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 + -1x2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x2 = 0 + 2 -1x2 = 0 + 2 Combine like terms: 0 + 2 = 2 -1x2 = 2 Divide each side by '-1'. x2 = -2 Simplifying x2 = -2 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 + 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 3

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}

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