2x^4+6x^2-1=0

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Solution for 2x^4+6x^2-1=0 equation:


Simplifying
2x4 + 6x2 + -1 = 0

Reorder the terms:
-1 + 6x2 + 2x4 = 0

Solving
-1 + 6x2 + 2x4 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-0.5 + 3x2 + x4 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 3x2 + 0.5 + x4 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 3x2 + x4 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 3x2 + x4 = 0 + 0.5
3x2 + x4 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
3x2 + x4 = 0.5

The x term is 3x2.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x2 + 2.25 + x4 = 0.5 + 2.25

Reorder the terms:
2.25 + 3x2 + x4 = 0.5 + 2.25

Combine like terms: 0.5 + 2.25 = 2.75
2.25 + 3x2 + x4 = 2.75

Factor a perfect square on the left side:
(x2 + 1.5)(x2 + 1.5) = 2.75

Calculate the square root of the right side: 1.658312395

Break this problem into two subproblems by setting 
(x2 + 1.5) equal to 1.658312395 and -1.658312395.

Subproblem 1

x2 + 1.5 = 1.658312395 Simplifying x2 + 1.5 = 1.658312395 Reorder the terms: 1.5 + x2 = 1.658312395 Solving 1.5 + x2 = 1.658312395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x2 = 1.658312395 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x2 = 1.658312395 + -1.5 x2 = 1.658312395 + -1.5 Combine like terms: 1.658312395 + -1.5 = 0.158312395 x2 = 0.158312395 Simplifying x2 = 0.158312395 Take the square root of each side: x = {-0.397884902, 0.397884902}

Subproblem 2

x2 + 1.5 = -1.658312395 Simplifying x2 + 1.5 = -1.658312395 Reorder the terms: 1.5 + x2 = -1.658312395 Solving 1.5 + x2 = -1.658312395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x2 = -1.658312395 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x2 = -1.658312395 + -1.5 x2 = -1.658312395 + -1.5 Combine like terms: -1.658312395 + -1.5 = -3.158312395 x2 = -3.158312395 Simplifying x2 = -3.158312395 Reorder the terms: 3.158312395 + x2 = -3.158312395 + 3.158312395 Combine like terms: -3.158312395 + 3.158312395 = 0.000000000 3.158312395 + 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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