9x^4+x^2-200=0

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Solution for 9x^4+x^2-200=0 equation:


Simplifying
9x4 + x2 + -200 = 0

Reorder the terms:
-200 + x2 + 9x4 = 0

Solving
-200 + x2 + 9x4 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-22.22222222 + 0.1111111111x2 + x4 = 0

Move the constant term to the right:

Add '22.22222222' to each side of the equation.
-22.22222222 + 0.1111111111x2 + 22.22222222 + x4 = 0 + 22.22222222

Reorder the terms:
-22.22222222 + 22.22222222 + 0.1111111111x2 + x4 = 0 + 22.22222222

Combine like terms: -22.22222222 + 22.22222222 = 0.00000000
0.00000000 + 0.1111111111x2 + x4 = 0 + 22.22222222
0.1111111111x2 + x4 = 0 + 22.22222222

Combine like terms: 0 + 22.22222222 = 22.22222222
0.1111111111x2 + x4 = 22.22222222

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

Add '0.25' to each side of the equation.
0.1111111111x2 + 0.25 + x4 = 22.22222222 + 0.25

Reorder the terms:
0.25 + 0.1111111111x2 + x4 = 22.22222222 + 0.25

Combine like terms: 22.22222222 + 0.25 = 22.47222222
0.25 + 0.1111111111x2 + x4 = 22.47222222

Factor a perfect square on the left side:
(x2 + 0.5)(x2 + 0.5) = 22.47222222

Calculate the square root of the right side: 4.740487551

Break this problem into two subproblems by setting 
(x2 + 0.5) equal to 4.740487551 and -4.740487551.

Subproblem 1

x2 + 0.5 = 4.740487551 Simplifying x2 + 0.5 = 4.740487551 Reorder the terms: 0.5 + x2 = 4.740487551 Solving 0.5 + x2 = 4.740487551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = 4.740487551 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = 4.740487551 + -0.5 x2 = 4.740487551 + -0.5 Combine like terms: 4.740487551 + -0.5 = 4.240487551 x2 = 4.240487551 Simplifying x2 = 4.240487551 Take the square root of each side: x = {-2.059244413, 2.059244413}

Subproblem 2

x2 + 0.5 = -4.740487551 Simplifying x2 + 0.5 = -4.740487551 Reorder the terms: 0.5 + x2 = -4.740487551 Solving 0.5 + x2 = -4.740487551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = -4.740487551 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = -4.740487551 + -0.5 x2 = -4.740487551 + -0.5 Combine like terms: -4.740487551 + -0.5 = -5.240487551 x2 = -5.240487551 Simplifying x2 = -5.240487551 Reorder the terms: 5.240487551 + x2 = -5.240487551 + 5.240487551 Combine like terms: -5.240487551 + 5.240487551 = 0.000000000 5.240487551 + 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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