11x^2+2x=11

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


Simplifying
11x2 + 2x = 11

Reorder the terms:
2x + 11x2 = 11

Solving
2x + 11x2 = 11

Solving for variable 'x'.

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

Combine like terms: 11 + -11 = 0
-11 + 2x + 11x2 = 0

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

Divide each side by '11'.
-1 + 0.1818181818x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.1818181818x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 0.1818181818x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 0.1818181818x + x2 = 0 + 1
0.1818181818x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.1818181818x + x2 = 1

The x term is 0.1818181818x.  Take half its coefficient (0.0909090909).
Square it (0.008264462808) and add it to both sides.

Add '0.008264462808' to each side of the equation.
0.1818181818x + 0.008264462808 + x2 = 1 + 0.008264462808

Reorder the terms:
0.008264462808 + 0.1818181818x + x2 = 1 + 0.008264462808

Combine like terms: 1 + 0.008264462808 = 1.008264462808
0.008264462808 + 0.1818181818x + x2 = 1.008264462808

Factor a perfect square on the left side:
(x + 0.0909090909)(x + 0.0909090909) = 1.008264462808

Calculate the square root of the right side: 1.004123729

Break this problem into two subproblems by setting 
(x + 0.0909090909) equal to 1.004123729 and -1.004123729.

Subproblem 1

x + 0.0909090909 = 1.004123729 Simplifying x + 0.0909090909 = 1.004123729 Reorder the terms: 0.0909090909 + x = 1.004123729 Solving 0.0909090909 + x = 1.004123729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = 1.004123729 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = 1.004123729 + -0.0909090909 x = 1.004123729 + -0.0909090909 Combine like terms: 1.004123729 + -0.0909090909 = 0.9132146381 x = 0.9132146381 Simplifying x = 0.9132146381

Subproblem 2

x + 0.0909090909 = -1.004123729 Simplifying x + 0.0909090909 = -1.004123729 Reorder the terms: 0.0909090909 + x = -1.004123729 Solving 0.0909090909 + x = -1.004123729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = -1.004123729 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = -1.004123729 + -0.0909090909 x = -1.004123729 + -0.0909090909 Combine like terms: -1.004123729 + -0.0909090909 = -1.0950328199 x = -1.0950328199 Simplifying x = -1.0950328199

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9132146381, -1.0950328199}

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