2x^4+8x^2+3=0

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Solution for 2x^4+8x^2+3=0 equation:


Simplifying
2x4 + 8x2 + 3 = 0

Reorder the terms:
3 + 8x2 + 2x4 = 0

Solving
3 + 8x2 + 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'.
1.5 + 4x2 + x4 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 4x2 + -1.5 + x4 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 4x2 + x4 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 4x2 + x4 = 0 + -1.5
4x2 + x4 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
4x2 + x4 = -1.5

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 = -1.5 + 4

Reorder the terms:
4 + 4x2 + x4 = -1.5 + 4

Combine like terms: -1.5 + 4 = 2.5
4 + 4x2 + x4 = 2.5

Factor a perfect square on the left side:
(x2 + 2)(x2 + 2) = 2.5

Calculate the square root of the right side: 1.58113883

Break this problem into two subproblems by setting 
(x2 + 2) equal to 1.58113883 and -1.58113883.

Subproblem 1

x2 + 2 = 1.58113883 Simplifying x2 + 2 = 1.58113883 Reorder the terms: 2 + x2 = 1.58113883 Solving 2 + x2 = 1.58113883 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 = 1.58113883 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = 1.58113883 + -2 x2 = 1.58113883 + -2 Combine like terms: 1.58113883 + -2 = -0.41886117 x2 = -0.41886117 Simplifying x2 = -0.41886117 Reorder the terms: 0.41886117 + x2 = -0.41886117 + 0.41886117 Combine like terms: -0.41886117 + 0.41886117 = 0.00000000 0.41886117 + x2 = 0.00000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 2 = -1.58113883 Simplifying x2 + 2 = -1.58113883 Reorder the terms: 2 + x2 = -1.58113883 Solving 2 + x2 = -1.58113883 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 = -1.58113883 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = -1.58113883 + -2 x2 = -1.58113883 + -2 Combine like terms: -1.58113883 + -2 = -3.58113883 x2 = -3.58113883 Simplifying x2 = -3.58113883 Reorder the terms: 3.58113883 + x2 = -3.58113883 + 3.58113883 Combine like terms: -3.58113883 + 3.58113883 = 0.00000000 3.58113883 + x2 = 0.00000000 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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