11x^2+2x=10

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Solution for 11x^2+2x=10 equation:


Simplifying
11x2 + 2x = 10

Reorder the terms:
2x + 11x2 = 10

Solving
2x + 11x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + 2x + 11x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 2x + 11x2 = 0

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

Divide each side by '11'.
-0.9090909091 + 0.1818181818x + x2 = 0

Move the constant term to the right:

Add '0.9090909091' to each side of the equation.
-0.9090909091 + 0.1818181818x + 0.9090909091 + x2 = 0 + 0.9090909091

Reorder the terms:
-0.9090909091 + 0.9090909091 + 0.1818181818x + x2 = 0 + 0.9090909091

Combine like terms: -0.9090909091 + 0.9090909091 = 0.0000000000
0.0000000000 + 0.1818181818x + x2 = 0 + 0.9090909091
0.1818181818x + x2 = 0 + 0.9090909091

Combine like terms: 0 + 0.9090909091 = 0.9090909091
0.1818181818x + x2 = 0.9090909091

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 = 0.9090909091 + 0.008264462808

Reorder the terms:
0.008264462808 + 0.1818181818x + x2 = 0.9090909091 + 0.008264462808

Combine like terms: 0.9090909091 + 0.008264462808 = 0.917355371908
0.008264462808 + 0.1818181818x + x2 = 0.917355371908

Factor a perfect square on the left side:
(x + 0.0909090909)(x + 0.0909090909) = 0.917355371908

Calculate the square root of the right side: 0.957786705

Break this problem into two subproblems by setting 
(x + 0.0909090909) equal to 0.957786705 and -0.957786705.

Subproblem 1

x + 0.0909090909 = 0.957786705 Simplifying x + 0.0909090909 = 0.957786705 Reorder the terms: 0.0909090909 + x = 0.957786705 Solving 0.0909090909 + x = 0.957786705 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 = 0.957786705 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = 0.957786705 + -0.0909090909 x = 0.957786705 + -0.0909090909 Combine like terms: 0.957786705 + -0.0909090909 = 0.8668776141 x = 0.8668776141 Simplifying x = 0.8668776141

Subproblem 2

x + 0.0909090909 = -0.957786705 Simplifying x + 0.0909090909 = -0.957786705 Reorder the terms: 0.0909090909 + x = -0.957786705 Solving 0.0909090909 + x = -0.957786705 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 = -0.957786705 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = -0.957786705 + -0.0909090909 x = -0.957786705 + -0.0909090909 Combine like terms: -0.957786705 + -0.0909090909 = -1.0486957959 x = -1.0486957959 Simplifying x = -1.0486957959

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8668776141, -1.0486957959}

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