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

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


Simplifying
2x4 + 4x2 + 1 = 0

Reorder the terms:
1 + 4x2 + 2x4 = 0

Solving
1 + 4x2 + 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 + 2x2 + x4 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + 2x2 + -0.5 + x4 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + 2x2 + x4 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 2x2 + x4 = 0 + -0.5
2x2 + x4 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
2x2 + x4 = -0.5

The x term is 2x2.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x2 + 1 + x4 = -0.5 + 1

Reorder the terms:
1 + 2x2 + x4 = -0.5 + 1

Combine like terms: -0.5 + 1 = 0.5
1 + 2x2 + x4 = 0.5

Factor a perfect square on the left side:
(x2 + 1)(x2 + 1) = 0.5

Calculate the square root of the right side: 0.707106781

Break this problem into two subproblems by setting 
(x2 + 1) equal to 0.707106781 and -0.707106781.

Subproblem 1

x2 + 1 = 0.707106781 Simplifying x2 + 1 = 0.707106781 Reorder the terms: 1 + x2 = 0.707106781 Solving 1 + x2 = 0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x2 = 0.707106781 + -1 Combine like terms: 1 + -1 = 0 0 + x2 = 0.707106781 + -1 x2 = 0.707106781 + -1 Combine like terms: 0.707106781 + -1 = -0.292893219 x2 = -0.292893219 Simplifying x2 = -0.292893219 Reorder the terms: 0.292893219 + x2 = -0.292893219 + 0.292893219 Combine like terms: -0.292893219 + 0.292893219 = 0.000000000 0.292893219 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 1 = -0.707106781 Simplifying x2 + 1 = -0.707106781 Reorder the terms: 1 + x2 = -0.707106781 Solving 1 + x2 = -0.707106781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x2 = -0.707106781 + -1 Combine like terms: 1 + -1 = 0 0 + x2 = -0.707106781 + -1 x2 = -0.707106781 + -1 Combine like terms: -0.707106781 + -1 = -1.707106781 x2 = -1.707106781 Simplifying x2 = -1.707106781 Reorder the terms: 1.707106781 + x2 = -1.707106781 + 1.707106781 Combine like terms: -1.707106781 + 1.707106781 = 0.000000000 1.707106781 + 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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