x^4-0.56x^2+0.0574=0

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Solution for x^4-0.56x^2+0.0574=0 equation:


Simplifying
x4 + -0.56x2 + 0.0574 = 0

Reorder the terms:
0.0574 + -0.56x2 + x4 = 0

Solving
0.0574 + -0.56x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.0574' to each side of the equation.
0.0574 + -0.56x2 + -0.0574 + x4 = 0 + -0.0574

Reorder the terms:
0.0574 + -0.0574 + -0.56x2 + x4 = 0 + -0.0574

Combine like terms: 0.0574 + -0.0574 = 0.0000
0.0000 + -0.56x2 + x4 = 0 + -0.0574
-0.56x2 + x4 = 0 + -0.0574

Combine like terms: 0 + -0.0574 = -0.0574
-0.56x2 + x4 = -0.0574

The x term is -0.56x2.  Take half its coefficient (-0.28).
Square it (0.0784) and add it to both sides.

Add '0.0784' to each side of the equation.
-0.56x2 + 0.0784 + x4 = -0.0574 + 0.0784

Reorder the terms:
0.0784 + -0.56x2 + x4 = -0.0574 + 0.0784

Combine like terms: -0.0574 + 0.0784 = 0.021
0.0784 + -0.56x2 + x4 = 0.021

Factor a perfect square on the left side:
(x2 + -0.28)(x2 + -0.28) = 0.021

Calculate the square root of the right side: 0.144913767

Break this problem into two subproblems by setting 
(x2 + -0.28) equal to 0.144913767 and -0.144913767.

Subproblem 1

x2 + -0.28 = 0.144913767 Simplifying x2 + -0.28 = 0.144913767 Reorder the terms: -0.28 + x2 = 0.144913767 Solving -0.28 + x2 = 0.144913767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.28' to each side of the equation. -0.28 + 0.28 + x2 = 0.144913767 + 0.28 Combine like terms: -0.28 + 0.28 = 0.00 0.00 + x2 = 0.144913767 + 0.28 x2 = 0.144913767 + 0.28 Combine like terms: 0.144913767 + 0.28 = 0.424913767 x2 = 0.424913767 Simplifying x2 = 0.424913767 Take the square root of each side: x = {-0.651854099, 0.651854099}

Subproblem 2

x2 + -0.28 = -0.144913767 Simplifying x2 + -0.28 = -0.144913767 Reorder the terms: -0.28 + x2 = -0.144913767 Solving -0.28 + x2 = -0.144913767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.28' to each side of the equation. -0.28 + 0.28 + x2 = -0.144913767 + 0.28 Combine like terms: -0.28 + 0.28 = 0.00 0.00 + x2 = -0.144913767 + 0.28 x2 = -0.144913767 + 0.28 Combine like terms: -0.144913767 + 0.28 = 0.135086233 x2 = 0.135086233 Simplifying x2 = 0.135086233 Take the square root of each side: x = {-0.367540791, 0.367540791}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.651854099, 0.651854099, -0.367540791, 0.367540791}

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