x^4-8x^2+0.5=1

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Solution for x^4-8x^2+0.5=1 equation:


Simplifying
x4 + -8x2 + 0.5 = 1

Reorder the terms:
0.5 + -8x2 + x4 = 1

Solving
0.5 + -8x2 + x4 = 1

Solving for variable 'x'.

Reorder the terms:
0.5 + -1 + -8x2 + x4 = 1 + -1

Combine like terms: 0.5 + -1 = -0.5
-0.5 + -8x2 + x4 = 1 + -1

Combine like terms: 1 + -1 = 0
-0.5 + -8x2 + x4 = 0

Begin completing the square.

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -8x2 + 0.5 + x4 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -8x2 + x4 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -8x2 + x4 = 0 + 0.5
-8x2 + x4 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-8x2 + x4 = 0.5

The x term is -8x2.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x2 + 16 + x4 = 0.5 + 16

Reorder the terms:
16 + -8x2 + x4 = 0.5 + 16

Combine like terms: 0.5 + 16 = 16.5
16 + -8x2 + x4 = 16.5

Factor a perfect square on the left side:
(x2 + -4)(x2 + -4) = 16.5

Calculate the square root of the right side: 4.062019202

Break this problem into two subproblems by setting 
(x2 + -4) equal to 4.062019202 and -4.062019202.

Subproblem 1

x2 + -4 = 4.062019202 Simplifying x2 + -4 = 4.062019202 Reorder the terms: -4 + x2 = 4.062019202 Solving -4 + x2 = 4.062019202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x2 = 4.062019202 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = 4.062019202 + 4 x2 = 4.062019202 + 4 Combine like terms: 4.062019202 + 4 = 8.062019202 x2 = 8.062019202 Simplifying x2 = 8.062019202 Take the square root of each side: x = {-2.839369508, 2.839369508}

Subproblem 2

x2 + -4 = -4.062019202 Simplifying x2 + -4 = -4.062019202 Reorder the terms: -4 + x2 = -4.062019202 Solving -4 + x2 = -4.062019202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x2 = -4.062019202 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = -4.062019202 + 4 x2 = -4.062019202 + 4 Combine like terms: -4.062019202 + 4 = -0.062019202 x2 = -0.062019202 Simplifying x2 = -0.062019202 Reorder the terms: 0.062019202 + x2 = -0.062019202 + 0.062019202 Combine like terms: -0.062019202 + 0.062019202 = 0.000000000 0.062019202 + 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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