x^2+11x-36=0

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Solution for x^2+11x-36=0 equation: 


Simplifying
x2 + 11x + -36 = 0

Reorder the terms:
-36 + 11x + x2 = 0

Solving
-36 + 11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 11x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + 11x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 11x + x2 = 0 + 36
11x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
11x + x2 = 36

The x term is 11x.  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.
11x + 30.25 + x2 = 36 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 36 + 30.25

Combine like terms: 36 + 30.25 = 66.25
30.25 + 11x + x2 = 66.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 66.25

Calculate the square root of the right side: 8.139410298

Break this problem into two subproblems by setting 
(x + 5.5) equal to 8.139410298 and -8.139410298.


Subproblem 1
x + 5.5 = 8.139410298

Simplifying
x + 5.5 = 8.139410298

Reorder the terms:
5.5 + x = 8.139410298

Solving
5.5 + x = 8.139410298

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5.5' to each side of the equation.
5.5 + -5.5 + x = 8.139410298 + -5.5

Combine like terms: 5.5 + -5.5 = 0.0
0.0 + x = 8.139410298 + -5.5
x = 8.139410298 + -5.5

Combine like terms: 8.139410298 + -5.5 = 2.639410298
x = 2.639410298

Simplifying
x = 2.639410298


Subproblem 2
x + 5.5 = -8.139410298

Simplifying
x + 5.5 = -8.139410298

Reorder the terms:
5.5 + x = -8.139410298

Solving
5.5 + x = -8.139410298

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5.5' to each side of the equation.
5.5 + -5.5 + x = -8.139410298 + -5.5

Combine like terms: 5.5 + -5.5 = 0.0
0.0 + x = -8.139410298 + -5.5
x = -8.139410298 + -5.5

Combine like terms: -8.139410298 + -5.5 = -13.639410298
x = -13.639410298

Simplifying
x = -13.639410298


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {2.639410298, -13.639410298}

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