9x^4+8x^2+1=0

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Solution for 9x^4+8x^2+1=0 equation:


Simplifying
9x4 + 8x2 + 1 = 0

Reorder the terms:
1 + 8x2 + 9x4 = 0

Solving
1 + 8x2 + 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'.
0.1111111111 + 0.8888888889x2 + x4 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + 0.8888888889x2 + -0.1111111111 + x4 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + 0.8888888889x2 + x4 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + 0.8888888889x2 + x4 = 0 + -0.1111111111
0.8888888889x2 + x4 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
0.8888888889x2 + x4 = -0.1111111111

The x term is 0.8888888889x2.  Take half its coefficient (0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
0.8888888889x2 + 0.1975308642 + x4 = -0.1111111111 + 0.1975308642

Reorder the terms:
0.1975308642 + 0.8888888889x2 + x4 = -0.1111111111 + 0.1975308642

Combine like terms: -0.1111111111 + 0.1975308642 = 0.0864197531
0.1975308642 + 0.8888888889x2 + x4 = 0.0864197531

Factor a perfect square on the left side:
(x2 + 0.4444444445)(x2 + 0.4444444445) = 0.0864197531

Calculate the square root of the right side: 0.293972368

Break this problem into two subproblems by setting 
(x2 + 0.4444444445) equal to 0.293972368 and -0.293972368.

Subproblem 1

x2 + 0.4444444445 = 0.293972368 Simplifying x2 + 0.4444444445 = 0.293972368 Reorder the terms: 0.4444444445 + x2 = 0.293972368 Solving 0.4444444445 + x2 = 0.293972368 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4444444445' to each side of the equation. 0.4444444445 + -0.4444444445 + x2 = 0.293972368 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x2 = 0.293972368 + -0.4444444445 x2 = 0.293972368 + -0.4444444445 Combine like terms: 0.293972368 + -0.4444444445 = -0.1504720765 x2 = -0.1504720765 Simplifying x2 = -0.1504720765 Reorder the terms: 0.1504720765 + x2 = -0.1504720765 + 0.1504720765 Combine like terms: -0.1504720765 + 0.1504720765 = 0.0000000000 0.1504720765 + x2 = 0.0000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 0.4444444445 = -0.293972368 Simplifying x2 + 0.4444444445 = -0.293972368 Reorder the terms: 0.4444444445 + x2 = -0.293972368 Solving 0.4444444445 + x2 = -0.293972368 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4444444445' to each side of the equation. 0.4444444445 + -0.4444444445 + x2 = -0.293972368 + -0.4444444445 Combine like terms: 0.4444444445 + -0.4444444445 = 0.0000000000 0.0000000000 + x2 = -0.293972368 + -0.4444444445 x2 = -0.293972368 + -0.4444444445 Combine like terms: -0.293972368 + -0.4444444445 = -0.7384168125 x2 = -0.7384168125 Simplifying x2 = -0.7384168125 Reorder the terms: 0.7384168125 + x2 = -0.7384168125 + 0.7384168125 Combine like terms: -0.7384168125 + 0.7384168125 = 0.0000000000 0.7384168125 + x2 = 0.0000000000 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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