x^4-4x^2+27=21x^2-117

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Solution for x^4-4x^2+27=21x^2-117 equation:


Simplifying
x4 + -4x2 + 27 = 21x2 + -117

Reorder the terms:
27 + -4x2 + x4 = 21x2 + -117

Reorder the terms:
27 + -4x2 + x4 = -117 + 21x2

Solving
27 + -4x2 + x4 = -117 + 21x2

Solving for variable 'x'.

Reorder the terms:
27 + 117 + -4x2 + -21x2 + x4 = -117 + 21x2 + 117 + -21x2

Combine like terms: 27 + 117 = 144
144 + -4x2 + -21x2 + x4 = -117 + 21x2 + 117 + -21x2

Combine like terms: -4x2 + -21x2 = -25x2
144 + -25x2 + x4 = -117 + 21x2 + 117 + -21x2

Reorder the terms:
144 + -25x2 + x4 = -117 + 117 + 21x2 + -21x2

Combine like terms: -117 + 117 = 0
144 + -25x2 + x4 = 0 + 21x2 + -21x2
144 + -25x2 + x4 = 21x2 + -21x2

Combine like terms: 21x2 + -21x2 = 0
144 + -25x2 + x4 = 0

Factor a trinomial.
(9 + -1x2)(16 + -1x2) = 0

Factor a difference between two squares.
((3 + x)(3 + -1x))(16 + -1x2) = 0

Factor a difference between two squares.
((4 + x)(4 + -1x))(3 + x)(3 + -1x) = 0

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

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

Subproblem 3

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Subproblem 4

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-3, 3, -4, 4}

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