0.5x^4+2.5x^2-2=0

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Solution for 0.5x^4+2.5x^2-2=0 equation:


Simplifying
0.5x4 + 2.5x2 + -2 = 0

Reorder the terms:
-2 + 2.5x2 + 0.5x4 = 0

Solving
-2 + 2.5x2 + 0.5x4 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
-4 + 5x2 + x4 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 5x2 + 4 + x4 = 0 + 4

Reorder the terms:
-4 + 4 + 5x2 + x4 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 5x2 + x4 = 0 + 4
5x2 + x4 = 0 + 4

Combine like terms: 0 + 4 = 4
5x2 + x4 = 4

The x term is 5x2.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x2 + 6.25 + x4 = 4 + 6.25

Reorder the terms:
6.25 + 5x2 + x4 = 4 + 6.25

Combine like terms: 4 + 6.25 = 10.25
6.25 + 5x2 + x4 = 10.25

Factor a perfect square on the left side:
(x2 + 2.5)(x2 + 2.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(x2 + 2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

x2 + 2.5 = 3.201562119 Simplifying x2 + 2.5 = 3.201562119 Reorder the terms: 2.5 + x2 = 3.201562119 Solving 2.5 + x2 = 3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x2 = 3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x2 = 3.201562119 + -2.5 x2 = 3.201562119 + -2.5 Combine like terms: 3.201562119 + -2.5 = 0.701562119 x2 = 0.701562119 Simplifying x2 = 0.701562119 Take the square root of each side: x = {-0.837593051, 0.837593051}

Subproblem 2

x2 + 2.5 = -3.201562119 Simplifying x2 + 2.5 = -3.201562119 Reorder the terms: 2.5 + x2 = -3.201562119 Solving 2.5 + x2 = -3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x2 = -3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x2 = -3.201562119 + -2.5 x2 = -3.201562119 + -2.5 Combine like terms: -3.201562119 + -2.5 = -5.701562119 x2 = -5.701562119 Simplifying x2 = -5.701562119 Reorder the terms: 5.701562119 + x2 = -5.701562119 + 5.701562119 Combine like terms: -5.701562119 + 5.701562119 = 0.000000000 5.701562119 + 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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