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

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


Simplifying
x4 + -6x2 + 2 = 0

Reorder the terms:
2 + -6x2 + x4 = 0

Solving
2 + -6x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -6x2 + -2 + x4 = 0 + -2

Reorder the terms:
2 + -2 + -6x2 + x4 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -6x2 + x4 = 0 + -2
-6x2 + x4 = 0 + -2

Combine like terms: 0 + -2 = -2
-6x2 + x4 = -2

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 = -2 + 9

Reorder the terms:
9 + -6x2 + x4 = -2 + 9

Combine like terms: -2 + 9 = 7
9 + -6x2 + x4 = 7

Factor a perfect square on the left side:
(x2 + -3)(x2 + -3) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x2 + -3) equal to 2.645751311 and -2.645751311.

Subproblem 1

x2 + -3 = 2.645751311 Simplifying x2 + -3 = 2.645751311 Reorder the terms: -3 + x2 = 2.645751311 Solving -3 + x2 = 2.645751311 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 = 2.645751311 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = 2.645751311 + 3 x2 = 2.645751311 + 3 Combine like terms: 2.645751311 + 3 = 5.645751311 x2 = 5.645751311 Simplifying x2 = 5.645751311 Take the square root of each side: x = {-2.376078978, 2.376078978}

Subproblem 2

x2 + -3 = -2.645751311 Simplifying x2 + -3 = -2.645751311 Reorder the terms: -3 + x2 = -2.645751311 Solving -3 + x2 = -2.645751311 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 = -2.645751311 + 3 Combine like terms: -3 + 3 = 0 0 + x2 = -2.645751311 + 3 x2 = -2.645751311 + 3 Combine like terms: -2.645751311 + 3 = 0.354248689 x2 = 0.354248689 Simplifying x2 = 0.354248689 Take the square root of each side: x = {-0.595187944, 0.595187944}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.376078978, 2.376078978, -0.595187944, 0.595187944}

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