x^4-x^2+0.245=0

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Solution for x^4-x^2+0.245=0 equation:


Simplifying
x4 + -1x2 + 0.245 = 0

Reorder the terms:
0.245 + -1x2 + x4 = 0

Solving
0.245 + -1x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.245' to each side of the equation.
0.245 + -1x2 + -0.245 + x4 = 0 + -0.245

Reorder the terms:
0.245 + -0.245 + -1x2 + x4 = 0 + -0.245

Combine like terms: 0.245 + -0.245 = 0.000
0.000 + -1x2 + x4 = 0 + -0.245
-1x2 + x4 = 0 + -0.245

Combine like terms: 0 + -0.245 = -0.245
-1x2 + x4 = -0.245

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 = -0.245 + 0.25

Reorder the terms:
0.25 + -1x2 + x4 = -0.245 + 0.25

Combine like terms: -0.245 + 0.25 = 0.005
0.25 + -1x2 + x4 = 0.005

Factor a perfect square on the left side:
(x2 + -0.5)(x2 + -0.5) = 0.005

Calculate the square root of the right side: 0.070710678

Break this problem into two subproblems by setting 
(x2 + -0.5) equal to 0.070710678 and -0.070710678.

Subproblem 1

x2 + -0.5 = 0.070710678 Simplifying x2 + -0.5 = 0.070710678 Reorder the terms: -0.5 + x2 = 0.070710678 Solving -0.5 + x2 = 0.070710678 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 = 0.070710678 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x2 = 0.070710678 + 0.5 x2 = 0.070710678 + 0.5 Combine like terms: 0.070710678 + 0.5 = 0.570710678 x2 = 0.570710678 Simplifying x2 = 0.570710678 Take the square root of each side: x = {-0.755453955, 0.755453955}

Subproblem 2

x2 + -0.5 = -0.070710678 Simplifying x2 + -0.5 = -0.070710678 Reorder the terms: -0.5 + x2 = -0.070710678 Solving -0.5 + x2 = -0.070710678 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 = -0.070710678 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x2 = -0.070710678 + 0.5 x2 = -0.070710678 + 0.5 Combine like terms: -0.070710678 + 0.5 = 0.429289322 x2 = 0.429289322 Simplifying x2 = 0.429289322 Take the square root of each side: x = {-0.655201741, 0.655201741}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.755453955, 0.755453955, -0.655201741, 0.655201741}

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