x^4-8x^2+0.5=2.5

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Solution for x^4-8x^2+0.5=2.5 equation:


Simplifying
x4 + -8x2 + 0.5 = 2.5

Reorder the terms:
0.5 + -8x2 + x4 = 2.5

Solving
0.5 + -8x2 + x4 = 2.5

Solving for variable 'x'.

Reorder the terms:
0.5 + -2.5 + -8x2 + x4 = 2.5 + -2.5

Combine like terms: 0.5 + -2.5 = -2
-2 + -8x2 + x4 = 2.5 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
-2 + -8x2 + x4 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -8x2 + 2 + x4 = 0.0 + 2

Reorder the terms:
-2 + 2 + -8x2 + x4 = 0.0 + 2

Combine like terms: -2 + 2 = 0
0 + -8x2 + x4 = 0.0 + 2
-8x2 + x4 = 0.0 + 2

Combine like terms: 0.0 + 2 = 2
-8x2 + x4 = 2

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 = 2 + 16

Reorder the terms:
16 + -8x2 + x4 = 2 + 16

Combine like terms: 2 + 16 = 18
16 + -8x2 + x4 = 18

Factor a perfect square on the left side:
(x2 + -4)(x2 + -4) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(x2 + -4) equal to 4.242640687 and -4.242640687.

Subproblem 1

x2 + -4 = 4.242640687 Simplifying x2 + -4 = 4.242640687 Reorder the terms: -4 + x2 = 4.242640687 Solving -4 + x2 = 4.242640687 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 = 4.242640687 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = 4.242640687 + 4 x2 = 4.242640687 + 4 Combine like terms: 4.242640687 + 4 = 8.242640687 x2 = 8.242640687 Simplifying x2 = 8.242640687 Take the square root of each side: x = {-2.870999945, 2.870999945}

Subproblem 2

x2 + -4 = -4.242640687 Simplifying x2 + -4 = -4.242640687 Reorder the terms: -4 + x2 = -4.242640687 Solving -4 + x2 = -4.242640687 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 = -4.242640687 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = -4.242640687 + 4 x2 = -4.242640687 + 4 Combine like terms: -4.242640687 + 4 = -0.242640687 x2 = -0.242640687 Simplifying x2 = -0.242640687 Reorder the terms: 0.242640687 + x2 = -0.242640687 + 0.242640687 Combine like terms: -0.242640687 + 0.242640687 = 0.000000000 0.242640687 + 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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