x^4-6x^2-1=0

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Solution for x^4-6x^2-1=0 equation:


Simplifying
x4 + -6x2 + -1 = 0

Reorder the terms:
-1 + -6x2 + x4 = 0

Solving
-1 + -6x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -6x2 + 1 + x4 = 0 + 1

Reorder the terms:
-1 + 1 + -6x2 + x4 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -6x2 + x4 = 0 + 1
-6x2 + x4 = 0 + 1

Combine like terms: 0 + 1 = 1
-6x2 + x4 = 1

The x term is -6x2.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x2 + 9 + x4 = 1 + 9

Reorder the terms:
9 + -6x2 + x4 = 1 + 9

Combine like terms: 1 + 9 = 10
9 + -6x2 + x4 = 10

Factor a perfect square on the left side:
(x2 + -3)(x2 + -3) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(x2 + -3) equal to 3.16227766 and -3.16227766.

Subproblem 1

x2 + -3 = 3.16227766 Simplifying x2 + -3 = 3.16227766 Reorder the terms: -3 + x2 = 3.16227766 Solving -3 + x2 = 3.16227766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x2 = 3.16227766 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = 3.16227766 + 3 x2 = 3.16227766 + 3 Combine like terms: 3.16227766 + 3 = 6.16227766 x2 = 6.16227766 Simplifying x2 = 6.16227766 Take the square root of each side: x = {-2.482393534, 2.482393534}

Subproblem 2

x2 + -3 = -3.16227766 Simplifying x2 + -3 = -3.16227766 Reorder the terms: -3 + x2 = -3.16227766 Solving -3 + x2 = -3.16227766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x2 = -3.16227766 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = -3.16227766 + 3 x2 = -3.16227766 + 3 Combine like terms: -3.16227766 + 3 = -0.16227766 x2 = -0.16227766 Simplifying x2 = -0.16227766 Reorder the terms: 0.16227766 + x2 = -0.16227766 + 0.16227766 Combine like terms: -0.16227766 + 0.16227766 = 0.00000000 0.16227766 + 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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