X^4-X^2-12=0

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Solution for X^4-X^2-12=0 equation:


Simplifying
X4 + -1X2 + -12 = 0

Reorder the terms:
-12 + -1X2 + X4 = 0

Solving
-12 + -1X2 + X4 = 0

Solving for variable 'X'.

Factor a trinomial.
(-3 + -1X2)(4 + -1X2) = 0

Factor a difference between two squares.
(-3 + -1X2)((2 + X)(2 + -1X)) = 0

Subproblem 1

Set the factor '(-3 + -1X2)' equal to zero and attempt to solve: Simplifying -3 + -1X2 = 0 Solving -3 + -1X2 = 0 Move all terms containing X to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1X2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1X2 = 0 + 3 -1X2 = 0 + 3 Combine like terms: 0 + 3 = 3 -1X2 = 3 Divide each side by '-1'. X2 = -3 Simplifying X2 = -3 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 '(2 + X)' equal to zero and attempt to solve: Simplifying 2 + X = 0 Solving 2 + X = 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 + X = 0 + -2 Combine like terms: 2 + -2 = 0 0 + X = 0 + -2 X = 0 + -2 Combine like terms: 0 + -2 = -2 X = -2 Simplifying X = -2

Subproblem 3

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

Solution

X = {-2, 2}

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