y^2+11y+11=0

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Solution for y^2+11y+11=0 equation:


Simplifying
y2 + 11y + 11 = 0

Reorder the terms:
11 + 11y + y2 = 0

Solving
11 + 11y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-11' to each side of the equation.
11 + 11y + -11 + y2 = 0 + -11

Reorder the terms:
11 + -11 + 11y + y2 = 0 + -11

Combine like terms: 11 + -11 = 0
0 + 11y + y2 = 0 + -11
11y + y2 = 0 + -11

Combine like terms: 0 + -11 = -11
11y + y2 = -11

The y term is 11y.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11y + 30.25 + y2 = -11 + 30.25

Reorder the terms:
30.25 + 11y + y2 = -11 + 30.25

Combine like terms: -11 + 30.25 = 19.25
30.25 + 11y + y2 = 19.25

Factor a perfect square on the left side:
(y + 5.5)(y + 5.5) = 19.25

Calculate the square root of the right side: 4.387482194

Break this problem into two subproblems by setting 
(y + 5.5) equal to 4.387482194 and -4.387482194.

Subproblem 1

y + 5.5 = 4.387482194 Simplifying y + 5.5 = 4.387482194 Reorder the terms: 5.5 + y = 4.387482194 Solving 5.5 + y = 4.387482194 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = 4.387482194 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = 4.387482194 + -5.5 y = 4.387482194 + -5.5 Combine like terms: 4.387482194 + -5.5 = -1.112517806 y = -1.112517806 Simplifying y = -1.112517806

Subproblem 2

y + 5.5 = -4.387482194 Simplifying y + 5.5 = -4.387482194 Reorder the terms: 5.5 + y = -4.387482194 Solving 5.5 + y = -4.387482194 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = -4.387482194 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = -4.387482194 + -5.5 y = -4.387482194 + -5.5 Combine like terms: -4.387482194 + -5.5 = -9.887482194 y = -9.887482194 Simplifying y = -9.887482194

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.112517806, -9.887482194}

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