11x^2+14x-1=0

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Solution for 11x^2+14x-1=0 equation:


Simplifying
11x2 + 14x + -1 = 0

Reorder the terms:
-1 + 14x + 11x2 = 0

Solving
-1 + 14x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-0.09090909091 + 1.272727273x + x2 = 0

Move the constant term to the right:

Add '0.09090909091' to each side of the equation.
-0.09090909091 + 1.272727273x + 0.09090909091 + x2 = 0 + 0.09090909091

Reorder the terms:
-0.09090909091 + 0.09090909091 + 1.272727273x + x2 = 0 + 0.09090909091

Combine like terms: -0.09090909091 + 0.09090909091 = 0.00000000000
0.00000000000 + 1.272727273x + x2 = 0 + 0.09090909091
1.272727273x + x2 = 0 + 0.09090909091

Combine like terms: 0 + 0.09090909091 = 0.09090909091
1.272727273x + x2 = 0.09090909091

The x term is 1.272727273x.  Take half its coefficient (0.6363636365).
Square it (0.4049586779) and add it to both sides.

Add '0.4049586779' to each side of the equation.
1.272727273x + 0.4049586779 + x2 = 0.09090909091 + 0.4049586779

Reorder the terms:
0.4049586779 + 1.272727273x + x2 = 0.09090909091 + 0.4049586779

Combine like terms: 0.09090909091 + 0.4049586779 = 0.49586776881
0.4049586779 + 1.272727273x + x2 = 0.49586776881

Factor a perfect square on the left side:
(x + 0.6363636365)(x + 0.6363636365) = 0.49586776881

Calculate the square root of the right side: 0.70417879

Break this problem into two subproblems by setting 
(x + 0.6363636365) equal to 0.70417879 and -0.70417879.

Subproblem 1

x + 0.6363636365 = 0.70417879 Simplifying x + 0.6363636365 = 0.70417879 Reorder the terms: 0.6363636365 + x = 0.70417879 Solving 0.6363636365 + x = 0.70417879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6363636365' to each side of the equation. 0.6363636365 + -0.6363636365 + x = 0.70417879 + -0.6363636365 Combine like terms: 0.6363636365 + -0.6363636365 = 0.0000000000 0.0000000000 + x = 0.70417879 + -0.6363636365 x = 0.70417879 + -0.6363636365 Combine like terms: 0.70417879 + -0.6363636365 = 0.0678151535 x = 0.0678151535 Simplifying x = 0.0678151535

Subproblem 2

x + 0.6363636365 = -0.70417879 Simplifying x + 0.6363636365 = -0.70417879 Reorder the terms: 0.6363636365 + x = -0.70417879 Solving 0.6363636365 + x = -0.70417879 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6363636365' to each side of the equation. 0.6363636365 + -0.6363636365 + x = -0.70417879 + -0.6363636365 Combine like terms: 0.6363636365 + -0.6363636365 = 0.0000000000 0.0000000000 + x = -0.70417879 + -0.6363636365 x = -0.70417879 + -0.6363636365 Combine like terms: -0.70417879 + -0.6363636365 = -1.3405424265 x = -1.3405424265 Simplifying x = -1.3405424265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.0678151535, -1.3405424265}

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