7(14x^2+5x-1)=1

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Solution for 7(14x^2+5x-1)=1 equation:


Simplifying
7(14x2 + 5x + -1) = 1

Reorder the terms:
7(-1 + 5x + 14x2) = 1
(-1 * 7 + 5x * 7 + 14x2 * 7) = 1
(-7 + 35x + 98x2) = 1

Solving
-7 + 35x + 98x2 = 1

Solving for variable 'x'.

Reorder the terms:
-7 + -1 + 35x + 98x2 = 1 + -1

Combine like terms: -7 + -1 = -8
-8 + 35x + 98x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-8 + 35x + 98x2 = 0

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

Divide each side by '98'.
-0.08163265306 + 0.3571428571x + x2 = 0

Move the constant term to the right:

Add '0.08163265306' to each side of the equation.
-0.08163265306 + 0.3571428571x + 0.08163265306 + x2 = 0 + 0.08163265306

Reorder the terms:
-0.08163265306 + 0.08163265306 + 0.3571428571x + x2 = 0 + 0.08163265306

Combine like terms: -0.08163265306 + 0.08163265306 = 0.00000000000
0.00000000000 + 0.3571428571x + x2 = 0 + 0.08163265306
0.3571428571x + x2 = 0 + 0.08163265306

Combine like terms: 0 + 0.08163265306 = 0.08163265306
0.3571428571x + x2 = 0.08163265306

The x term is 0.3571428571x.  Take half its coefficient (0.1785714286).
Square it (0.03188775511) and add it to both sides.

Add '0.03188775511' to each side of the equation.
0.3571428571x + 0.03188775511 + x2 = 0.08163265306 + 0.03188775511

Reorder the terms:
0.03188775511 + 0.3571428571x + x2 = 0.08163265306 + 0.03188775511

Combine like terms: 0.08163265306 + 0.03188775511 = 0.11352040817
0.03188775511 + 0.3571428571x + x2 = 0.11352040817

Factor a perfect square on the left side:
(x + 0.1785714286)(x + 0.1785714286) = 0.11352040817

Calculate the square root of the right side: 0.336927898

Break this problem into two subproblems by setting 
(x + 0.1785714286) equal to 0.336927898 and -0.336927898.

Subproblem 1

x + 0.1785714286 = 0.336927898 Simplifying x + 0.1785714286 = 0.336927898 Reorder the terms: 0.1785714286 + x = 0.336927898 Solving 0.1785714286 + x = 0.336927898 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1785714286' to each side of the equation. 0.1785714286 + -0.1785714286 + x = 0.336927898 + -0.1785714286 Combine like terms: 0.1785714286 + -0.1785714286 = 0.0000000000 0.0000000000 + x = 0.336927898 + -0.1785714286 x = 0.336927898 + -0.1785714286 Combine like terms: 0.336927898 + -0.1785714286 = 0.1583564694 x = 0.1583564694 Simplifying x = 0.1583564694

Subproblem 2

x + 0.1785714286 = -0.336927898 Simplifying x + 0.1785714286 = -0.336927898 Reorder the terms: 0.1785714286 + x = -0.336927898 Solving 0.1785714286 + x = -0.336927898 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1785714286' to each side of the equation. 0.1785714286 + -0.1785714286 + x = -0.336927898 + -0.1785714286 Combine like terms: 0.1785714286 + -0.1785714286 = 0.0000000000 0.0000000000 + x = -0.336927898 + -0.1785714286 x = -0.336927898 + -0.1785714286 Combine like terms: -0.336927898 + -0.1785714286 = -0.5154993266 x = -0.5154993266 Simplifying x = -0.5154993266

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1583564694, -0.5154993266}

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