14x^2-12x-1=0

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Solution for 14x^2-12x-1=0 equation:


Simplifying
14x2 + -12x + -1 = 0

Reorder the terms:
-1 + -12x + 14x2 = 0

Solving
-1 + -12x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
-0.07142857143 + -0.8571428571x + x2 = 0

Move the constant term to the right:

Add '0.07142857143' to each side of the equation.
-0.07142857143 + -0.8571428571x + 0.07142857143 + x2 = 0 + 0.07142857143

Reorder the terms:
-0.07142857143 + 0.07142857143 + -0.8571428571x + x2 = 0 + 0.07142857143

Combine like terms: -0.07142857143 + 0.07142857143 = 0.00000000000
0.00000000000 + -0.8571428571x + x2 = 0 + 0.07142857143
-0.8571428571x + x2 = 0 + 0.07142857143

Combine like terms: 0 + 0.07142857143 = 0.07142857143
-0.8571428571x + x2 = 0.07142857143

The x term is -0.8571428571x.  Take half its coefficient (-0.4285714286).
Square it (0.1836734694) and add it to both sides.

Add '0.1836734694' to each side of the equation.
-0.8571428571x + 0.1836734694 + x2 = 0.07142857143 + 0.1836734694

Reorder the terms:
0.1836734694 + -0.8571428571x + x2 = 0.07142857143 + 0.1836734694

Combine like terms: 0.07142857143 + 0.1836734694 = 0.25510204083
0.1836734694 + -0.8571428571x + x2 = 0.25510204083

Factor a perfect square on the left side:
(x + -0.4285714286)(x + -0.4285714286) = 0.25510204083

Calculate the square root of the right side: 0.505076272

Break this problem into two subproblems by setting 
(x + -0.4285714286) equal to 0.505076272 and -0.505076272.

Subproblem 1

x + -0.4285714286 = 0.505076272 Simplifying x + -0.4285714286 = 0.505076272 Reorder the terms: -0.4285714286 + x = 0.505076272 Solving -0.4285714286 + x = 0.505076272 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = 0.505076272 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = 0.505076272 + 0.4285714286 x = 0.505076272 + 0.4285714286 Combine like terms: 0.505076272 + 0.4285714286 = 0.9336477006 x = 0.9336477006 Simplifying x = 0.9336477006

Subproblem 2

x + -0.4285714286 = -0.505076272 Simplifying x + -0.4285714286 = -0.505076272 Reorder the terms: -0.4285714286 + x = -0.505076272 Solving -0.4285714286 + x = -0.505076272 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = -0.505076272 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = -0.505076272 + 0.4285714286 x = -0.505076272 + 0.4285714286 Combine like terms: -0.505076272 + 0.4285714286 = -0.0765048434 x = -0.0765048434 Simplifying x = -0.0765048434

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9336477006, -0.0765048434}

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