4x^4+13x^2+5=0

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Solution for 4x^4+13x^2+5=0 equation:


Simplifying
4x4 + 13x2 + 5 = 0

Reorder the terms:
5 + 13x2 + 4x4 = 0

Solving
5 + 13x2 + 4x4 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
1.25 + 3.25x2 + x4 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + 3.25x2 + -1.25 + x4 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + 3.25x2 + x4 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + 3.25x2 + x4 = 0 + -1.25
3.25x2 + x4 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
3.25x2 + x4 = -1.25

The x term is 3.25x2.  Take half its coefficient (1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
3.25x2 + 2.640625 + x4 = -1.25 + 2.640625

Reorder the terms:
2.640625 + 3.25x2 + x4 = -1.25 + 2.640625

Combine like terms: -1.25 + 2.640625 = 1.390625
2.640625 + 3.25x2 + x4 = 1.390625

Factor a perfect square on the left side:
(x2 + 1.625)(x2 + 1.625) = 1.390625

Calculate the square root of the right side: 1.179247642

Break this problem into two subproblems by setting 
(x2 + 1.625) equal to 1.179247642 and -1.179247642.

Subproblem 1

x2 + 1.625 = 1.179247642 Simplifying x2 + 1.625 = 1.179247642 Reorder the terms: 1.625 + x2 = 1.179247642 Solving 1.625 + x2 = 1.179247642 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x2 = 1.179247642 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x2 = 1.179247642 + -1.625 x2 = 1.179247642 + -1.625 Combine like terms: 1.179247642 + -1.625 = -0.445752358 x2 = -0.445752358 Simplifying x2 = -0.445752358 Reorder the terms: 0.445752358 + x2 = -0.445752358 + 0.445752358 Combine like terms: -0.445752358 + 0.445752358 = 0.000000000 0.445752358 + 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 + 1.625 = -1.179247642 Simplifying x2 + 1.625 = -1.179247642 Reorder the terms: 1.625 + x2 = -1.179247642 Solving 1.625 + x2 = -1.179247642 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x2 = -1.179247642 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x2 = -1.179247642 + -1.625 x2 = -1.179247642 + -1.625 Combine like terms: -1.179247642 + -1.625 = -2.804247642 x2 = -2.804247642 Simplifying x2 = -2.804247642 Reorder the terms: 2.804247642 + x2 = -2.804247642 + 2.804247642 Combine like terms: -2.804247642 + 2.804247642 = 0.000000000 2.804247642 + 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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