5x^4-5x^2+1=0

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Solution for 5x^4-5x^2+1=0 equation:


Simplifying
5x4 + -5x2 + 1 = 0

Reorder the terms:
1 + -5x2 + 5x4 = 0

Solving
1 + -5x2 + 5x4 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
0.2 + -1x2 + x4 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -1x2 + -0.2 + x4 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -1x2 + x4 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -1x2 + x4 = 0 + -0.2
-1x2 + x4 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-1x2 + x4 = -0.2

The x term is -1x2.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x2 + 0.25 + x4 = -0.2 + 0.25

Reorder the terms:
0.25 + -1x2 + x4 = -0.2 + 0.25

Combine like terms: -0.2 + 0.25 = 0.05
0.25 + -1x2 + x4 = 0.05

Factor a perfect square on the left side:
(x2 + -0.5)(x2 + -0.5) = 0.05

Calculate the square root of the right side: 0.223606798

Break this problem into two subproblems by setting 
(x2 + -0.5) equal to 0.223606798 and -0.223606798.

Subproblem 1

x2 + -0.5 = 0.223606798 Simplifying x2 + -0.5 = 0.223606798 Reorder the terms: -0.5 + x2 = 0.223606798 Solving -0.5 + x2 = 0.223606798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x2 = 0.223606798 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x2 = 0.223606798 + 0.5 x2 = 0.223606798 + 0.5 Combine like terms: 0.223606798 + 0.5 = 0.723606798 x2 = 0.723606798 Simplifying x2 = 0.723606798 Take the square root of each side: x = {-0.850650808, 0.850650808}

Subproblem 2

x2 + -0.5 = -0.223606798 Simplifying x2 + -0.5 = -0.223606798 Reorder the terms: -0.5 + x2 = -0.223606798 Solving -0.5 + x2 = -0.223606798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x2 = -0.223606798 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x2 = -0.223606798 + 0.5 x2 = -0.223606798 + 0.5 Combine like terms: -0.223606798 + 0.5 = 0.276393202 x2 = 0.276393202 Simplifying x2 = 0.276393202 Take the square root of each side: x = {-0.525731112, 0.525731112}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.850650808, 0.850650808, -0.525731112, 0.525731112}

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