16x^4-8x^2=1

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Solution for 16x^4-8x^2=1 equation:


Simplifying
16x4 + -8x2 = 1

Reorder the terms:
-8x2 + 16x4 = 1

Solving
-8x2 + 16x4 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + -8x2 + 16x4 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -8x2 + 16x4 = 0

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

Divide each side by '16'.
-0.0625 + -0.5x2 + x4 = 0

Move the constant term to the right:

Add '0.0625' to each side of the equation.
-0.0625 + -0.5x2 + 0.0625 + x4 = 0 + 0.0625

Reorder the terms:
-0.0625 + 0.0625 + -0.5x2 + x4 = 0 + 0.0625

Combine like terms: -0.0625 + 0.0625 = 0.0000
0.0000 + -0.5x2 + x4 = 0 + 0.0625
-0.5x2 + x4 = 0 + 0.0625

Combine like terms: 0 + 0.0625 = 0.0625
-0.5x2 + x4 = 0.0625

The x term is -0.5x2.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x2 + 0.0625 + x4 = 0.0625 + 0.0625

Reorder the terms:
0.0625 + -0.5x2 + x4 = 0.0625 + 0.0625

Combine like terms: 0.0625 + 0.0625 = 0.125
0.0625 + -0.5x2 + x4 = 0.125

Factor a perfect square on the left side:
(x2 + -0.25)(x2 + -0.25) = 0.125

Calculate the square root of the right side: 0.353553391

Break this problem into two subproblems by setting 
(x2 + -0.25) equal to 0.353553391 and -0.353553391.

Subproblem 1

x2 + -0.25 = 0.353553391 Simplifying x2 + -0.25 = 0.353553391 Reorder the terms: -0.25 + x2 = 0.353553391 Solving -0.25 + x2 = 0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x2 = 0.353553391 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x2 = 0.353553391 + 0.25 x2 = 0.353553391 + 0.25 Combine like terms: 0.353553391 + 0.25 = 0.603553391 x2 = 0.603553391 Simplifying x2 = 0.603553391 Take the square root of each side: x = {-0.776886987, 0.776886987}

Subproblem 2

x2 + -0.25 = -0.353553391 Simplifying x2 + -0.25 = -0.353553391 Reorder the terms: -0.25 + x2 = -0.353553391 Solving -0.25 + x2 = -0.353553391 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x2 = -0.353553391 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x2 = -0.353553391 + 0.25 x2 = -0.353553391 + 0.25 Combine like terms: -0.353553391 + 0.25 = -0.103553391 x2 = -0.103553391 Simplifying x2 = -0.103553391 Reorder the terms: 0.103553391 + x2 = -0.103553391 + 0.103553391 Combine like terms: -0.103553391 + 0.103553391 = 0.000000000 0.103553391 + 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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