x^4+100x^2-100=0

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Solution for x^4+100x^2-100=0 equation:


Simplifying
x4 + 100x2 + -100 = 0

Reorder the terms:
-100 + 100x2 + x4 = 0

Solving
-100 + 100x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 100x2 + 100 + x4 = 0 + 100

Reorder the terms:
-100 + 100 + 100x2 + x4 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 100x2 + x4 = 0 + 100
100x2 + x4 = 0 + 100

Combine like terms: 0 + 100 = 100
100x2 + x4 = 100

The x term is 100x2.  Take half its coefficient (50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
100x2 + 2500 + x4 = 100 + 2500

Reorder the terms:
2500 + 100x2 + x4 = 100 + 2500

Combine like terms: 100 + 2500 = 2600
2500 + 100x2 + x4 = 2600

Factor a perfect square on the left side:
(x2 + 50)(x2 + 50) = 2600

Calculate the square root of the right side: 50.990195136

Break this problem into two subproblems by setting 
(x2 + 50) equal to 50.990195136 and -50.990195136.

Subproblem 1

x2 + 50 = 50.990195136 Simplifying x2 + 50 = 50.990195136 Reorder the terms: 50 + x2 = 50.990195136 Solving 50 + x2 = 50.990195136 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x2 = 50.990195136 + -50 Combine like terms: 50 + -50 = 0 0 + x2 = 50.990195136 + -50 x2 = 50.990195136 + -50 Combine like terms: 50.990195136 + -50 = 0.990195136 x2 = 0.990195136 Simplifying x2 = 0.990195136 Take the square root of each side: x = {-0.995085492, 0.995085492}

Subproblem 2

x2 + 50 = -50.990195136 Simplifying x2 + 50 = -50.990195136 Reorder the terms: 50 + x2 = -50.990195136 Solving 50 + x2 = -50.990195136 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x2 = -50.990195136 + -50 Combine like terms: 50 + -50 = 0 0 + x2 = -50.990195136 + -50 x2 = -50.990195136 + -50 Combine like terms: -50.990195136 + -50 = -100.990195136 x2 = -100.990195136 Simplifying x2 = -100.990195136 Reorder the terms: 100.990195136 + x2 = -100.990195136 + 100.990195136 Combine like terms: -100.990195136 + 100.990195136 = 0.000000000 100.990195136 + 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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