3x^4+12x^2-5=0

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Solution for 3x^4+12x^2-5=0 equation:


Simplifying
3x4 + 12x2 + -5 = 0

Reorder the terms:
-5 + 12x2 + 3x4 = 0

Solving
-5 + 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'.
-1.666666667 + 4x2 + x4 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + 4x2 + 1.666666667 + x4 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + 4x2 + x4 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + 4x2 + x4 = 0 + 1.666666667
4x2 + x4 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
4x2 + x4 = 1.666666667

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 = 1.666666667 + 4

Reorder the terms:
4 + 4x2 + x4 = 1.666666667 + 4

Combine like terms: 1.666666667 + 4 = 5.666666667
4 + 4x2 + x4 = 5.666666667

Factor a perfect square on the left side:
(x2 + 2)(x2 + 2) = 5.666666667

Calculate the square root of the right side: 2.380476143

Break this problem into two subproblems by setting 
(x2 + 2) equal to 2.380476143 and -2.380476143.

Subproblem 1

x2 + 2 = 2.380476143 Simplifying x2 + 2 = 2.380476143 Reorder the terms: 2 + x2 = 2.380476143 Solving 2 + x2 = 2.380476143 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 = 2.380476143 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = 2.380476143 + -2 x2 = 2.380476143 + -2 Combine like terms: 2.380476143 + -2 = 0.380476143 x2 = 0.380476143 Simplifying x2 = 0.380476143 Take the square root of each side: x = {-0.616827482, 0.616827482}

Subproblem 2

x2 + 2 = -2.380476143 Simplifying x2 + 2 = -2.380476143 Reorder the terms: 2 + x2 = -2.380476143 Solving 2 + x2 = -2.380476143 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 = -2.380476143 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = -2.380476143 + -2 x2 = -2.380476143 + -2 Combine like terms: -2.380476143 + -2 = -4.380476143 x2 = -4.380476143 Simplifying x2 = -4.380476143 Reorder the terms: 4.380476143 + x2 = -4.380476143 + 4.380476143 Combine like terms: -4.380476143 + 4.380476143 = 0.000000000 4.380476143 + 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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