3x^4-12x^2-4=0

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Solution for 3x^4-12x^2-4=0 equation:


Simplifying
3x4 + -12x2 + -4 = 0

Reorder the terms:
-4 + -12x2 + 3x4 = 0

Solving
-4 + -12x2 + 3x4 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-1.333333333 + -4x2 + x4 = 0

Move the constant term to the right:

Add '1.333333333' to each side of the equation.
-1.333333333 + -4x2 + 1.333333333 + x4 = 0 + 1.333333333

Reorder the terms:
-1.333333333 + 1.333333333 + -4x2 + x4 = 0 + 1.333333333

Combine like terms: -1.333333333 + 1.333333333 = 0.000000000
0.000000000 + -4x2 + x4 = 0 + 1.333333333
-4x2 + x4 = 0 + 1.333333333

Combine like terms: 0 + 1.333333333 = 1.333333333
-4x2 + x4 = 1.333333333

The x term is -4x2.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x2 + 4 + x4 = 1.333333333 + 4

Reorder the terms:
4 + -4x2 + x4 = 1.333333333 + 4

Combine like terms: 1.333333333 + 4 = 5.333333333
4 + -4x2 + x4 = 5.333333333

Factor a perfect square on the left side:
(x2 + -2)(x2 + -2) = 5.333333333

Calculate the square root of the right side: 2.309401077

Break this problem into two subproblems by setting 
(x2 + -2) equal to 2.309401077 and -2.309401077.

Subproblem 1

x2 + -2 = 2.309401077 Simplifying x2 + -2 = 2.309401077 Reorder the terms: -2 + x2 = 2.309401077 Solving -2 + x2 = 2.309401077 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x2 = 2.309401077 + 2 Combine like terms: -2 + 2 = 0 0 + x2 = 2.309401077 + 2 x2 = 2.309401077 + 2 Combine like terms: 2.309401077 + 2 = 4.309401077 x2 = 4.309401077 Simplifying x2 = 4.309401077 Take the square root of each side: x = {-2.075909699, 2.075909699}

Subproblem 2

x2 + -2 = -2.309401077 Simplifying x2 + -2 = -2.309401077 Reorder the terms: -2 + x2 = -2.309401077 Solving -2 + x2 = -2.309401077 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x2 = -2.309401077 + 2 Combine like terms: -2 + 2 = 0 0 + x2 = -2.309401077 + 2 x2 = -2.309401077 + 2 Combine like terms: -2.309401077 + 2 = -0.309401077 x2 = -0.309401077 Simplifying x2 = -0.309401077 Reorder the terms: 0.309401077 + x2 = -0.309401077 + 0.309401077 Combine like terms: -0.309401077 + 0.309401077 = 0.000000000 0.309401077 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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