x^4+2x^2-25=0

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Solution for x^4+2x^2-25=0 equation:


Simplifying
x4 + 2x2 + -25 = 0

Reorder the terms:
-25 + 2x2 + x4 = 0

Solving
-25 + 2x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 2x2 + 25 + x4 = 0 + 25

Reorder the terms:
-25 + 25 + 2x2 + x4 = 0 + 25

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

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

The x term is 2x2.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x2 + 1 + x4 = 25 + 1

Reorder the terms:
1 + 2x2 + x4 = 25 + 1

Combine like terms: 25 + 1 = 26
1 + 2x2 + x4 = 26

Factor a perfect square on the left side:
(x2 + 1)(x2 + 1) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(x2 + 1) equal to 5.099019514 and -5.099019514.

Subproblem 1

x2 + 1 = 5.099019514 Simplifying x2 + 1 = 5.099019514 Reorder the terms: 1 + x2 = 5.099019514 Solving 1 + x2 = 5.099019514 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x2 = 5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + x2 = 5.099019514 + -1 x2 = 5.099019514 + -1 Combine like terms: 5.099019514 + -1 = 4.099019514 x2 = 4.099019514 Simplifying x2 = 4.099019514 Take the square root of each side: x = {-2.024603545, 2.024603545}

Subproblem 2

x2 + 1 = -5.099019514 Simplifying x2 + 1 = -5.099019514 Reorder the terms: 1 + x2 = -5.099019514 Solving 1 + x2 = -5.099019514 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x2 = -5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + x2 = -5.099019514 + -1 x2 = -5.099019514 + -1 Combine like terms: -5.099019514 + -1 = -6.099019514 x2 = -6.099019514 Simplifying x2 = -6.099019514 Reorder the terms: 6.099019514 + x2 = -6.099019514 + 6.099019514 Combine like terms: -6.099019514 + 6.099019514 = 0.000000000 6.099019514 + 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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