x^4+x^2-14=0

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Solution for x^4+x^2-14=0 equation:


Simplifying
x4 + x2 + -14 = 0

Reorder the terms:
-14 + x2 + x4 = 0

Solving
-14 + x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + x2 + 14 + x4 = 0 + 14

Reorder the terms:
-14 + 14 + x2 + x4 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + x2 + x4 = 0 + 14
x2 + x4 = 0 + 14

Combine like terms: 0 + 14 = 14
x2 + x4 = 14

The x term is x2.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x2 + 0.25 + x4 = 14 + 0.25

Reorder the terms:
0.25 + x2 + x4 = 14 + 0.25

Combine like terms: 14 + 0.25 = 14.25
0.25 + x2 + x4 = 14.25

Factor a perfect square on the left side:
(x2 + 0.5)(x2 + 0.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(x2 + 0.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

x2 + 0.5 = 3.774917218 Simplifying x2 + 0.5 = 3.774917218 Reorder the terms: 0.5 + x2 = 3.774917218 Solving 0.5 + x2 = 3.774917218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = 3.774917218 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = 3.774917218 + -0.5 x2 = 3.774917218 + -0.5 Combine like terms: 3.774917218 + -0.5 = 3.274917218 x2 = 3.274917218 Simplifying x2 = 3.274917218 Take the square root of each side: x = {-1.809673235, 1.809673235}

Subproblem 2

x2 + 0.5 = -3.774917218 Simplifying x2 + 0.5 = -3.774917218 Reorder the terms: 0.5 + x2 = -3.774917218 Solving 0.5 + x2 = -3.774917218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = -3.774917218 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = -3.774917218 + -0.5 x2 = -3.774917218 + -0.5 Combine like terms: -3.774917218 + -0.5 = -4.274917218 x2 = -4.274917218 Simplifying x2 = -4.274917218 Reorder the terms: 4.274917218 + x2 = -4.274917218 + 4.274917218 Combine like terms: -4.274917218 + 4.274917218 = 0.000000000 4.274917218 + 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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