125x^4+216x^2+27=0

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Solution for 125x^4+216x^2+27=0 equation:


Simplifying
125x4 + 216x2 + 27 = 0

Reorder the terms:
27 + 216x2 + 125x4 = 0

Solving
27 + 216x2 + 125x4 = 0

Solving for variable 'x'.

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

Divide each side by '125'.
0.216 + 1.728x2 + x4 = 0

Move the constant term to the right:

Add '-0.216' to each side of the equation.
0.216 + 1.728x2 + -0.216 + x4 = 0 + -0.216

Reorder the terms:
0.216 + -0.216 + 1.728x2 + x4 = 0 + -0.216

Combine like terms: 0.216 + -0.216 = 0.000
0.000 + 1.728x2 + x4 = 0 + -0.216
1.728x2 + x4 = 0 + -0.216

Combine like terms: 0 + -0.216 = -0.216
1.728x2 + x4 = -0.216

The x term is 1.728x2.  Take half its coefficient (0.864).
Square it (0.746496) and add it to both sides.

Add '0.746496' to each side of the equation.
1.728x2 + 0.746496 + x4 = -0.216 + 0.746496

Reorder the terms:
0.746496 + 1.728x2 + x4 = -0.216 + 0.746496

Combine like terms: -0.216 + 0.746496 = 0.530496
0.746496 + 1.728x2 + x4 = 0.530496

Factor a perfect square on the left side:
(x2 + 0.864)(x2 + 0.864) = 0.530496

Calculate the square root of the right side: 0.728351563

Break this problem into two subproblems by setting 
(x2 + 0.864) equal to 0.728351563 and -0.728351563.

Subproblem 1

x2 + 0.864 = 0.728351563 Simplifying x2 + 0.864 = 0.728351563 Reorder the terms: 0.864 + x2 = 0.728351563 Solving 0.864 + x2 = 0.728351563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.864' to each side of the equation. 0.864 + -0.864 + x2 = 0.728351563 + -0.864 Combine like terms: 0.864 + -0.864 = 0.000 0.000 + x2 = 0.728351563 + -0.864 x2 = 0.728351563 + -0.864 Combine like terms: 0.728351563 + -0.864 = -0.135648437 x2 = -0.135648437 Simplifying x2 = -0.135648437 Reorder the terms: 0.135648437 + x2 = -0.135648437 + 0.135648437 Combine like terms: -0.135648437 + 0.135648437 = 0.000000000 0.135648437 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 0.864 = -0.728351563 Simplifying x2 + 0.864 = -0.728351563 Reorder the terms: 0.864 + x2 = -0.728351563 Solving 0.864 + x2 = -0.728351563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.864' to each side of the equation. 0.864 + -0.864 + x2 = -0.728351563 + -0.864 Combine like terms: 0.864 + -0.864 = 0.000 0.000 + x2 = -0.728351563 + -0.864 x2 = -0.728351563 + -0.864 Combine like terms: -0.728351563 + -0.864 = -1.592351563 x2 = -1.592351563 Simplifying x2 = -1.592351563 Reorder the terms: 1.592351563 + x2 = -1.592351563 + 1.592351563 Combine like terms: -1.592351563 + 1.592351563 = 0.000000000 1.592351563 + 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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