14x^2+11x-11=0

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Solution for 14x^2+11x-11=0 equation:


Simplifying
14x2 + 11x + -11 = 0

Reorder the terms:
-11 + 11x + 14x2 = 0

Solving
-11 + 11x + 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'.
-0.7857142857 + 0.7857142857x + x2 = 0

Move the constant term to the right:

Add '0.7857142857' to each side of the equation.
-0.7857142857 + 0.7857142857x + 0.7857142857 + x2 = 0 + 0.7857142857

Reorder the terms:
-0.7857142857 + 0.7857142857 + 0.7857142857x + x2 = 0 + 0.7857142857

Combine like terms: -0.7857142857 + 0.7857142857 = 0.0000000000
0.0000000000 + 0.7857142857x + x2 = 0 + 0.7857142857
0.7857142857x + x2 = 0 + 0.7857142857

Combine like terms: 0 + 0.7857142857 = 0.7857142857
0.7857142857x + x2 = 0.7857142857

The x term is 0.7857142857x.  Take half its coefficient (0.3928571429).
Square it (0.1543367347) and add it to both sides.

Add '0.1543367347' to each side of the equation.
0.7857142857x + 0.1543367347 + x2 = 0.7857142857 + 0.1543367347

Reorder the terms:
0.1543367347 + 0.7857142857x + x2 = 0.7857142857 + 0.1543367347

Combine like terms: 0.7857142857 + 0.1543367347 = 0.9400510204
0.1543367347 + 0.7857142857x + x2 = 0.9400510204

Factor a perfect square on the left side:
(x + 0.3928571429)(x + 0.3928571429) = 0.9400510204

Calculate the square root of the right side: 0.969562283

Break this problem into two subproblems by setting 
(x + 0.3928571429) equal to 0.969562283 and -0.969562283.

Subproblem 1

x + 0.3928571429 = 0.969562283 Simplifying x + 0.3928571429 = 0.969562283 Reorder the terms: 0.3928571429 + x = 0.969562283 Solving 0.3928571429 + x = 0.969562283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3928571429' to each side of the equation. 0.3928571429 + -0.3928571429 + x = 0.969562283 + -0.3928571429 Combine like terms: 0.3928571429 + -0.3928571429 = 0.0000000000 0.0000000000 + x = 0.969562283 + -0.3928571429 x = 0.969562283 + -0.3928571429 Combine like terms: 0.969562283 + -0.3928571429 = 0.5767051401 x = 0.5767051401 Simplifying x = 0.5767051401

Subproblem 2

x + 0.3928571429 = -0.969562283 Simplifying x + 0.3928571429 = -0.969562283 Reorder the terms: 0.3928571429 + x = -0.969562283 Solving 0.3928571429 + x = -0.969562283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3928571429' to each side of the equation. 0.3928571429 + -0.3928571429 + x = -0.969562283 + -0.3928571429 Combine like terms: 0.3928571429 + -0.3928571429 = 0.0000000000 0.0000000000 + x = -0.969562283 + -0.3928571429 x = -0.969562283 + -0.3928571429 Combine like terms: -0.969562283 + -0.3928571429 = -1.3624194259 x = -1.3624194259 Simplifying x = -1.3624194259

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5767051401, -1.3624194259}

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