14x^2-11x-2=0

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


Simplifying
14x2 + -11x + -2 = 0

Reorder the terms:
-2 + -11x + 14x2 = 0

Solving
-2 + -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'.
-0.1428571429 + -0.7857142857x + x2 = 0

Move the constant term to the right:

Add '0.1428571429' to each side of the equation.
-0.1428571429 + -0.7857142857x + 0.1428571429 + x2 = 0 + 0.1428571429

Reorder the terms:
-0.1428571429 + 0.1428571429 + -0.7857142857x + x2 = 0 + 0.1428571429

Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000
0.0000000000 + -0.7857142857x + x2 = 0 + 0.1428571429
-0.7857142857x + x2 = 0 + 0.1428571429

Combine like terms: 0 + 0.1428571429 = 0.1428571429
-0.7857142857x + x2 = 0.1428571429

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 = 0.1428571429 + 0.1543367347

Reorder the terms:
0.1543367347 + -0.7857142857x + x2 = 0.1428571429 + 0.1543367347

Combine like terms: 0.1428571429 + 0.1543367347 = 0.2971938776
0.1543367347 + -0.7857142857x + x2 = 0.2971938776

Factor a perfect square on the left side:
(x + -0.3928571429)(x + -0.3928571429) = 0.2971938776

Calculate the square root of the right side: 0.545154912

Break this problem into two subproblems by setting 
(x + -0.3928571429) equal to 0.545154912 and -0.545154912.

Subproblem 1

x + -0.3928571429 = 0.545154912 Simplifying x + -0.3928571429 = 0.545154912 Reorder the terms: -0.3928571429 + x = 0.545154912 Solving -0.3928571429 + x = 0.545154912 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 = 0.545154912 + 0.3928571429 Combine like terms: -0.3928571429 + 0.3928571429 = 0.0000000000 0.0000000000 + x = 0.545154912 + 0.3928571429 x = 0.545154912 + 0.3928571429 Combine like terms: 0.545154912 + 0.3928571429 = 0.9380120549 x = 0.9380120549 Simplifying x = 0.9380120549

Subproblem 2

x + -0.3928571429 = -0.545154912 Simplifying x + -0.3928571429 = -0.545154912 Reorder the terms: -0.3928571429 + x = -0.545154912 Solving -0.3928571429 + x = -0.545154912 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 = -0.545154912 + 0.3928571429 Combine like terms: -0.3928571429 + 0.3928571429 = 0.0000000000 0.0000000000 + x = -0.545154912 + 0.3928571429 x = -0.545154912 + 0.3928571429 Combine like terms: -0.545154912 + 0.3928571429 = -0.1522977691 x = -0.1522977691 Simplifying x = -0.1522977691

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9380120549, -0.1522977691}

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