11x^2+4x=1

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Solution for 11x^2+4x=1 equation:


Simplifying
11x2 + 4x = 1

Reorder the terms:
4x + 11x2 = 1

Solving
4x + 11x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 4x + 11x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 4x + 11x2 = 0

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

Divide each side by '11'.
-0.09090909091 + 0.3636363636x + x2 = 0

Move the constant term to the right:

Add '0.09090909091' to each side of the equation.
-0.09090909091 + 0.3636363636x + 0.09090909091 + x2 = 0 + 0.09090909091

Reorder the terms:
-0.09090909091 + 0.09090909091 + 0.3636363636x + x2 = 0 + 0.09090909091

Combine like terms: -0.09090909091 + 0.09090909091 = 0.00000000000
0.00000000000 + 0.3636363636x + x2 = 0 + 0.09090909091
0.3636363636x + x2 = 0 + 0.09090909091

Combine like terms: 0 + 0.09090909091 = 0.09090909091
0.3636363636x + x2 = 0.09090909091

The x term is 0.3636363636x.  Take half its coefficient (0.1818181818).
Square it (0.03305785123) and add it to both sides.

Add '0.03305785123' to each side of the equation.
0.3636363636x + 0.03305785123 + x2 = 0.09090909091 + 0.03305785123

Reorder the terms:
0.03305785123 + 0.3636363636x + x2 = 0.09090909091 + 0.03305785123

Combine like terms: 0.09090909091 + 0.03305785123 = 0.12396694214
0.03305785123 + 0.3636363636x + x2 = 0.12396694214

Factor a perfect square on the left side:
(x + 0.1818181818)(x + 0.1818181818) = 0.12396694214

Calculate the square root of the right side: 0.352089395

Break this problem into two subproblems by setting 
(x + 0.1818181818) equal to 0.352089395 and -0.352089395.

Subproblem 1

x + 0.1818181818 = 0.352089395 Simplifying x + 0.1818181818 = 0.352089395 Reorder the terms: 0.1818181818 + x = 0.352089395 Solving 0.1818181818 + x = 0.352089395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1818181818' to each side of the equation. 0.1818181818 + -0.1818181818 + x = 0.352089395 + -0.1818181818 Combine like terms: 0.1818181818 + -0.1818181818 = 0.0000000000 0.0000000000 + x = 0.352089395 + -0.1818181818 x = 0.352089395 + -0.1818181818 Combine like terms: 0.352089395 + -0.1818181818 = 0.1702712132 x = 0.1702712132 Simplifying x = 0.1702712132

Subproblem 2

x + 0.1818181818 = -0.352089395 Simplifying x + 0.1818181818 = -0.352089395 Reorder the terms: 0.1818181818 + x = -0.352089395 Solving 0.1818181818 + x = -0.352089395 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1818181818' to each side of the equation. 0.1818181818 + -0.1818181818 + x = -0.352089395 + -0.1818181818 Combine like terms: 0.1818181818 + -0.1818181818 = 0.0000000000 0.0000000000 + x = -0.352089395 + -0.1818181818 x = -0.352089395 + -0.1818181818 Combine like terms: -0.352089395 + -0.1818181818 = -0.5339075768 x = -0.5339075768 Simplifying x = -0.5339075768

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1702712132, -0.5339075768}

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