14x^2+4x-13=0

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Solution for 14x^2+4x-13=0 equation:


Simplifying
14x2 + 4x + -13 = 0

Reorder the terms:
-13 + 4x + 14x2 = 0

Solving
-13 + 4x + 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'.
-0.9285714286 + 0.2857142857x + x2 = 0

Move the constant term to the right:

Add '0.9285714286' to each side of the equation.
-0.9285714286 + 0.2857142857x + 0.9285714286 + x2 = 0 + 0.9285714286

Reorder the terms:
-0.9285714286 + 0.9285714286 + 0.2857142857x + x2 = 0 + 0.9285714286

Combine like terms: -0.9285714286 + 0.9285714286 = 0.0000000000
0.0000000000 + 0.2857142857x + x2 = 0 + 0.9285714286
0.2857142857x + x2 = 0 + 0.9285714286

Combine like terms: 0 + 0.9285714286 = 0.9285714286
0.2857142857x + x2 = 0.9285714286

The x term is 0.2857142857x.  Take half its coefficient (0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
0.2857142857x + 0.02040816328 + x2 = 0.9285714286 + 0.02040816328

Reorder the terms:
0.02040816328 + 0.2857142857x + x2 = 0.9285714286 + 0.02040816328

Combine like terms: 0.9285714286 + 0.02040816328 = 0.94897959188
0.02040816328 + 0.2857142857x + x2 = 0.94897959188

Factor a perfect square on the left side:
(x + 0.1428571429)(x + 0.1428571429) = 0.94897959188

Calculate the square root of the right side: 0.974155836

Break this problem into two subproblems by setting 
(x + 0.1428571429) equal to 0.974155836 and -0.974155836.

Subproblem 1

x + 0.1428571429 = 0.974155836 Simplifying x + 0.1428571429 = 0.974155836 Reorder the terms: 0.1428571429 + x = 0.974155836 Solving 0.1428571429 + x = 0.974155836 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = 0.974155836 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = 0.974155836 + -0.1428571429 x = 0.974155836 + -0.1428571429 Combine like terms: 0.974155836 + -0.1428571429 = 0.8312986931 x = 0.8312986931 Simplifying x = 0.8312986931

Subproblem 2

x + 0.1428571429 = -0.974155836 Simplifying x + 0.1428571429 = -0.974155836 Reorder the terms: 0.1428571429 + x = -0.974155836 Solving 0.1428571429 + x = -0.974155836 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = -0.974155836 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = -0.974155836 + -0.1428571429 x = -0.974155836 + -0.1428571429 Combine like terms: -0.974155836 + -0.1428571429 = -1.1170129789 x = -1.1170129789 Simplifying x = -1.1170129789

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8312986931, -1.1170129789}

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