11x^2+22x+4=0

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Solution for 11x^2+22x+4=0 equation:


Simplifying
11x2 + 22x + 4 = 0

Reorder the terms:
4 + 22x + 11x2 = 0

Solving
4 + 22x + 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'.
0.3636363636 + 2x + x2 = 0

Move the constant term to the right:

Add '-0.3636363636' to each side of the equation.
0.3636363636 + 2x + -0.3636363636 + x2 = 0 + -0.3636363636

Reorder the terms:
0.3636363636 + -0.3636363636 + 2x + x2 = 0 + -0.3636363636

Combine like terms: 0.3636363636 + -0.3636363636 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + -0.3636363636
2x + x2 = 0 + -0.3636363636

Combine like terms: 0 + -0.3636363636 = -0.3636363636
2x + x2 = -0.3636363636

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -0.3636363636 + 1

Reorder the terms:
1 + 2x + x2 = -0.3636363636 + 1

Combine like terms: -0.3636363636 + 1 = 0.6363636364
1 + 2x + x2 = 0.6363636364

Factor a perfect square on the left side:
(x + 1)(x + 1) = 0.6363636364

Calculate the square root of the right side: 0.797724035

Break this problem into two subproblems by setting 
(x + 1) equal to 0.797724035 and -0.797724035.

Subproblem 1

x + 1 = 0.797724035 Simplifying x + 1 = 0.797724035 Reorder the terms: 1 + x = 0.797724035 Solving 1 + x = 0.797724035 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0.797724035 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0.797724035 + -1 x = 0.797724035 + -1 Combine like terms: 0.797724035 + -1 = -0.202275965 x = -0.202275965 Simplifying x = -0.202275965

Subproblem 2

x + 1 = -0.797724035 Simplifying x + 1 = -0.797724035 Reorder the terms: 1 + x = -0.797724035 Solving 1 + x = -0.797724035 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -0.797724035 + -1 Combine like terms: 1 + -1 = 0 0 + x = -0.797724035 + -1 x = -0.797724035 + -1 Combine like terms: -0.797724035 + -1 = -1.797724035 x = -1.797724035 Simplifying x = -1.797724035

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.202275965, -1.797724035}

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