2x^4+20x^2=-25

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Solution for 2x^4+20x^2=-25 equation:


Simplifying
2x4 + 20x2 = -25

Reorder the terms:
20x2 + 2x4 = -25

Solving
20x2 + 2x4 = -25

Solving for variable 'x'.

Reorder the terms:
25 + 20x2 + 2x4 = -25 + 25

Combine like terms: -25 + 25 = 0
25 + 20x2 + 2x4 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
12.5 + 10x2 + x4 = 0

Move the constant term to the right:

Add '-12.5' to each side of the equation.
12.5 + 10x2 + -12.5 + x4 = 0 + -12.5

Reorder the terms:
12.5 + -12.5 + 10x2 + x4 = 0 + -12.5

Combine like terms: 12.5 + -12.5 = 0.0
0.0 + 10x2 + x4 = 0 + -12.5
10x2 + x4 = 0 + -12.5

Combine like terms: 0 + -12.5 = -12.5
10x2 + x4 = -12.5

The x term is 10x2.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x2 + 25 + x4 = -12.5 + 25

Reorder the terms:
25 + 10x2 + x4 = -12.5 + 25

Combine like terms: -12.5 + 25 = 12.5
25 + 10x2 + x4 = 12.5

Factor a perfect square on the left side:
(x2 + 5)(x2 + 5) = 12.5

Calculate the square root of the right side: 3.535533906

Break this problem into two subproblems by setting 
(x2 + 5) equal to 3.535533906 and -3.535533906.

Subproblem 1

x2 + 5 = 3.535533906 Simplifying x2 + 5 = 3.535533906 Reorder the terms: 5 + x2 = 3.535533906 Solving 5 + x2 = 3.535533906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x2 = 3.535533906 + -5 Combine like terms: 5 + -5 = 0 0 + x2 = 3.535533906 + -5 x2 = 3.535533906 + -5 Combine like terms: 3.535533906 + -5 = -1.464466094 x2 = -1.464466094 Simplifying x2 = -1.464466094 Reorder the terms: 1.464466094 + x2 = -1.464466094 + 1.464466094 Combine like terms: -1.464466094 + 1.464466094 = 0.000000000 1.464466094 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 5 = -3.535533906 Simplifying x2 + 5 = -3.535533906 Reorder the terms: 5 + x2 = -3.535533906 Solving 5 + x2 = -3.535533906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x2 = -3.535533906 + -5 Combine like terms: 5 + -5 = 0 0 + x2 = -3.535533906 + -5 x2 = -3.535533906 + -5 Combine like terms: -3.535533906 + -5 = -8.535533906 x2 = -8.535533906 Simplifying x2 = -8.535533906 Reorder the terms: 8.535533906 + x2 = -8.535533906 + 8.535533906 Combine like terms: -8.535533906 + 8.535533906 = 0.000000000 8.535533906 + 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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