27x+31x^2-1=0

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Solution for 27x+31x^2-1=0 equation:


Simplifying
27x + 31x2 + -1 = 0

Reorder the terms:
-1 + 27x + 31x2 = 0

Solving
-1 + 27x + 31x2 = 0

Solving for variable 'x'.

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

Divide each side by '31'.
-0.03225806452 + 0.8709677419x + x2 = 0

Move the constant term to the right:

Add '0.03225806452' to each side of the equation.
-0.03225806452 + 0.8709677419x + 0.03225806452 + x2 = 0 + 0.03225806452

Reorder the terms:
-0.03225806452 + 0.03225806452 + 0.8709677419x + x2 = 0 + 0.03225806452

Combine like terms: -0.03225806452 + 0.03225806452 = 0.00000000000
0.00000000000 + 0.8709677419x + x2 = 0 + 0.03225806452
0.8709677419x + x2 = 0 + 0.03225806452

Combine like terms: 0 + 0.03225806452 = 0.03225806452
0.8709677419x + x2 = 0.03225806452

The x term is 0.8709677419x.  Take half its coefficient (0.435483871).
Square it (0.1896462019) and add it to both sides.

Add '0.1896462019' to each side of the equation.
0.8709677419x + 0.1896462019 + x2 = 0.03225806452 + 0.1896462019

Reorder the terms:
0.1896462019 + 0.8709677419x + x2 = 0.03225806452 + 0.1896462019

Combine like terms: 0.03225806452 + 0.1896462019 = 0.22190426642
0.1896462019 + 0.8709677419x + x2 = 0.22190426642

Factor a perfect square on the left side:
(x + 0.435483871)(x + 0.435483871) = 0.22190426642

Calculate the square root of the right side: 0.471067157

Break this problem into two subproblems by setting 
(x + 0.435483871) equal to 0.471067157 and -0.471067157.

Subproblem 1

x + 0.435483871 = 0.471067157 Simplifying x + 0.435483871 = 0.471067157 Reorder the terms: 0.435483871 + x = 0.471067157 Solving 0.435483871 + x = 0.471067157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.435483871' to each side of the equation. 0.435483871 + -0.435483871 + x = 0.471067157 + -0.435483871 Combine like terms: 0.435483871 + -0.435483871 = 0.000000000 0.000000000 + x = 0.471067157 + -0.435483871 x = 0.471067157 + -0.435483871 Combine like terms: 0.471067157 + -0.435483871 = 0.035583286 x = 0.035583286 Simplifying x = 0.035583286

Subproblem 2

x + 0.435483871 = -0.471067157 Simplifying x + 0.435483871 = -0.471067157 Reorder the terms: 0.435483871 + x = -0.471067157 Solving 0.435483871 + x = -0.471067157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.435483871' to each side of the equation. 0.435483871 + -0.435483871 + x = -0.471067157 + -0.435483871 Combine like terms: 0.435483871 + -0.435483871 = 0.000000000 0.000000000 + x = -0.471067157 + -0.435483871 x = -0.471067157 + -0.435483871 Combine like terms: -0.471067157 + -0.435483871 = -0.906551028 x = -0.906551028 Simplifying x = -0.906551028

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.035583286, -0.906551028}

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