x^4-8x^2-29=0

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Solution for x^4-8x^2-29=0 equation:


Simplifying
x4 + -8x2 + -29 = 0

Reorder the terms:
-29 + -8x2 + x4 = 0

Solving
-29 + -8x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '29' to each side of the equation.
-29 + -8x2 + 29 + x4 = 0 + 29

Reorder the terms:
-29 + 29 + -8x2 + x4 = 0 + 29

Combine like terms: -29 + 29 = 0
0 + -8x2 + x4 = 0 + 29
-8x2 + x4 = 0 + 29

Combine like terms: 0 + 29 = 29
-8x2 + x4 = 29

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 = 29 + 16

Reorder the terms:
16 + -8x2 + x4 = 29 + 16

Combine like terms: 29 + 16 = 45
16 + -8x2 + x4 = 45

Factor a perfect square on the left side:
(x2 + -4)(x2 + -4) = 45

Calculate the square root of the right side: 6.708203933

Break this problem into two subproblems by setting 
(x2 + -4) equal to 6.708203933 and -6.708203933.

Subproblem 1

x2 + -4 = 6.708203933 Simplifying x2 + -4 = 6.708203933 Reorder the terms: -4 + x2 = 6.708203933 Solving -4 + x2 = 6.708203933 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 = 6.708203933 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = 6.708203933 + 4 x2 = 6.708203933 + 4 Combine like terms: 6.708203933 + 4 = 10.708203933 x2 = 10.708203933 Simplifying x2 = 10.708203933 Take the square root of each side: x = {-3.272339214, 3.272339214}

Subproblem 2

x2 + -4 = -6.708203933 Simplifying x2 + -4 = -6.708203933 Reorder the terms: -4 + x2 = -6.708203933 Solving -4 + x2 = -6.708203933 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 = -6.708203933 + 4 Combine like terms: -4 + 4 = 0 0 + x2 = -6.708203933 + 4 x2 = -6.708203933 + 4 Combine like terms: -6.708203933 + 4 = -2.708203933 x2 = -2.708203933 Simplifying x2 = -2.708203933 Reorder the terms: 2.708203933 + x2 = -2.708203933 + 2.708203933 Combine like terms: -2.708203933 + 2.708203933 = 0.000000000 2.708203933 + 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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