x^4+11x^2+26=0

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Solution for x^4+11x^2+26=0 equation:


Simplifying
x4 + 11x2 + 26 = 0

Reorder the terms:
26 + 11x2 + x4 = 0

Solving
26 + 11x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-26' to each side of the equation.
26 + 11x2 + -26 + x4 = 0 + -26

Reorder the terms:
26 + -26 + 11x2 + x4 = 0 + -26

Combine like terms: 26 + -26 = 0
0 + 11x2 + x4 = 0 + -26
11x2 + x4 = 0 + -26

Combine like terms: 0 + -26 = -26
11x2 + x4 = -26

The x term is 11x2.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11x2 + 30.25 + x4 = -26 + 30.25

Reorder the terms:
30.25 + 11x2 + x4 = -26 + 30.25

Combine like terms: -26 + 30.25 = 4.25
30.25 + 11x2 + x4 = 4.25

Factor a perfect square on the left side:
(x2 + 5.5)(x2 + 5.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(x2 + 5.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

x2 + 5.5 = 2.061552813 Simplifying x2 + 5.5 = 2.061552813 Reorder the terms: 5.5 + x2 = 2.061552813 Solving 5.5 + x2 = 2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x2 = 2.061552813 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x2 = 2.061552813 + -5.5 x2 = 2.061552813 + -5.5 Combine like terms: 2.061552813 + -5.5 = -3.438447187 x2 = -3.438447187 Simplifying x2 = -3.438447187 Reorder the terms: 3.438447187 + x2 = -3.438447187 + 3.438447187 Combine like terms: -3.438447187 + 3.438447187 = 0.000000000 3.438447187 + 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 + 5.5 = -2.061552813 Simplifying x2 + 5.5 = -2.061552813 Reorder the terms: 5.5 + x2 = -2.061552813 Solving 5.5 + x2 = -2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x2 = -2.061552813 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x2 = -2.061552813 + -5.5 x2 = -2.061552813 + -5.5 Combine like terms: -2.061552813 + -5.5 = -7.561552813 x2 = -7.561552813 Simplifying x2 = -7.561552813 Reorder the terms: 7.561552813 + x2 = -7.561552813 + 7.561552813 Combine like terms: -7.561552813 + 7.561552813 = 0.000000000 7.561552813 + 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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