22x+5x^2=-11

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Solution for 22x+5x^2=-11 equation:


Simplifying
22x + 5x2 = -11

Solving
22x + 5x2 = -11

Solving for variable 'x'.

Reorder the terms:
11 + 22x + 5x2 = -11 + 11

Combine like terms: -11 + 11 = 0
11 + 22x + 5x2 = 0

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

Divide each side by '5'.
2.2 + 4.4x + x2 = 0

Move the constant term to the right:

Add '-2.2' to each side of the equation.
2.2 + 4.4x + -2.2 + x2 = 0 + -2.2

Reorder the terms:
2.2 + -2.2 + 4.4x + x2 = 0 + -2.2

Combine like terms: 2.2 + -2.2 = 0.0
0.0 + 4.4x + x2 = 0 + -2.2
4.4x + x2 = 0 + -2.2

Combine like terms: 0 + -2.2 = -2.2
4.4x + x2 = -2.2

The x term is 4.4x.  Take half its coefficient (2.2).
Square it (4.84) and add it to both sides.

Add '4.84' to each side of the equation.
4.4x + 4.84 + x2 = -2.2 + 4.84

Reorder the terms:
4.84 + 4.4x + x2 = -2.2 + 4.84

Combine like terms: -2.2 + 4.84 = 2.64
4.84 + 4.4x + x2 = 2.64

Factor a perfect square on the left side:
(x + 2.2)(x + 2.2) = 2.64

Calculate the square root of the right side: 1.624807681

Break this problem into two subproblems by setting 
(x + 2.2) equal to 1.624807681 and -1.624807681.

Subproblem 1

x + 2.2 = 1.624807681 Simplifying x + 2.2 = 1.624807681 Reorder the terms: 2.2 + x = 1.624807681 Solving 2.2 + x = 1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.2' to each side of the equation. 2.2 + -2.2 + x = 1.624807681 + -2.2 Combine like terms: 2.2 + -2.2 = 0.0 0.0 + x = 1.624807681 + -2.2 x = 1.624807681 + -2.2 Combine like terms: 1.624807681 + -2.2 = -0.575192319 x = -0.575192319 Simplifying x = -0.575192319

Subproblem 2

x + 2.2 = -1.624807681 Simplifying x + 2.2 = -1.624807681 Reorder the terms: 2.2 + x = -1.624807681 Solving 2.2 + x = -1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.2' to each side of the equation. 2.2 + -2.2 + x = -1.624807681 + -2.2 Combine like terms: 2.2 + -2.2 = 0.0 0.0 + x = -1.624807681 + -2.2 x = -1.624807681 + -2.2 Combine like terms: -1.624807681 + -2.2 = -3.824807681 x = -3.824807681 Simplifying x = -3.824807681

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.575192319, -3.824807681}

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