x^4=.000256

Solution for x^4=.000256 equation:

Simplifying
x4 = 0.000256

Solving
x4 = 0.000256

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Simplifying
x4 = 0.000256

Reorder the terms:
-0.000256 + x4 = 0.000256 + -0.000256

Combine like terms: 0.000256 + -0.000256 = 0.000000
-0.000256 + x4 = 0.000000

Factor a difference between two squares.
(0.016 + x2)(-0.016 + x2) = 0.000000

Subproblem 1
Set the factor '(0.016 + x2)' equal to zero and attempt to solve:

Simplifying
0.016 + x2 = 0

Solving
0.016 + x2 = 0

Move all terms containing x to the left, all other terms to the right.

Add '-0.016' to each side of the equation.
0.016 + -0.016 + x2 = 0 + -0.016

Combine like terms: 0.016 + -0.016 = 0.000
0.000 + x2 = 0 + -0.016
x2 = 0 + -0.016

Combine like terms: 0 + -0.016 = -0.016
x2 = -0.016

Simplifying
x2 = -0.016

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Subproblem 2
Set the factor '(-0.016 + x2)' equal to zero and attempt to solve:

Simplifying
-0.016 + x2 = 0

Solving
-0.016 + x2 = 0

Move all terms containing x to the left, all other terms to the right.

Add '0.016' to each side of the equation.
-0.016 + 0.016 + x2 = 0 + 0.016

Combine like terms: -0.016 + 0.016 = 0.000
0.000 + x2 = 0 + 0.016
x2 = 0 + 0.016

Combine like terms: 0 + 0.016 = 0.016
x2 = 0.016

Simplifying
x2 = 0.016

Take the square root of each side:
x = {-0.126491106, 0.126491106}
Solution
x = {-0.126491106, 0.126491106}