x^4+6x^2-11=0

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Solution for x^4+6x^2-11=0 equation:


Simplifying
x4 + 6x2 + -11 = 0

Reorder the terms:
-11 + 6x2 + x4 = 0

Solving
-11 + 6x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 6x2 + 11 + x4 = 0 + 11

Reorder the terms:
-11 + 11 + 6x2 + x4 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 6x2 + x4 = 0 + 11
6x2 + x4 = 0 + 11

Combine like terms: 0 + 11 = 11
6x2 + x4 = 11

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 = 11 + 9

Reorder the terms:
9 + 6x2 + x4 = 11 + 9

Combine like terms: 11 + 9 = 20
9 + 6x2 + x4 = 20

Factor a perfect square on the left side:
(x2 + 3)(x2 + 3) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(x2 + 3) equal to 4.472135955 and -4.472135955.

Subproblem 1

x2 + 3 = 4.472135955 Simplifying x2 + 3 = 4.472135955 Reorder the terms: 3 + x2 = 4.472135955 Solving 3 + x2 = 4.472135955 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 = 4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = 4.472135955 + -3 x2 = 4.472135955 + -3 Combine like terms: 4.472135955 + -3 = 1.472135955 x2 = 1.472135955 Simplifying x2 = 1.472135955 Take the square root of each side: x = {-1.213316099, 1.213316099}

Subproblem 2

x2 + 3 = -4.472135955 Simplifying x2 + 3 = -4.472135955 Reorder the terms: 3 + x2 = -4.472135955 Solving 3 + x2 = -4.472135955 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 = -4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = -4.472135955 + -3 x2 = -4.472135955 + -3 Combine like terms: -4.472135955 + -3 = -7.472135955 x2 = -7.472135955 Simplifying x2 = -7.472135955 Reorder the terms: 7.472135955 + x2 = -7.472135955 + 7.472135955 Combine like terms: -7.472135955 + 7.472135955 = 0.000000000 7.472135955 + 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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