x^2+11x+13=

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Solution for x^2+11x+13= equation:


Simplifying
x2 + 11x + 13 = 0

Reorder the terms:
13 + 11x + x2 = 0

Solving
13 + 11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + 11x + -13 + x2 = 0 + -13

Reorder the terms:
13 + -13 + 11x + x2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 11x + x2 = 0 + -13
11x + x2 = 0 + -13

Combine like terms: 0 + -13 = -13
11x + x2 = -13

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 = -13 + 30.25

Reorder the terms:
30.25 + 11x + x2 = -13 + 30.25

Combine like terms: -13 + 30.25 = 17.25
30.25 + 11x + x2 = 17.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 17.25

Calculate the square root of the right side: 4.153311931

Break this problem into two subproblems by setting 
(x + 5.5) equal to 4.153311931 and -4.153311931.

Subproblem 1

x + 5.5 = 4.153311931 Simplifying x + 5.5 = 4.153311931 Reorder the terms: 5.5 + x = 4.153311931 Solving 5.5 + x = 4.153311931 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 = 4.153311931 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 4.153311931 + -5.5 x = 4.153311931 + -5.5 Combine like terms: 4.153311931 + -5.5 = -1.346688069 x = -1.346688069 Simplifying x = -1.346688069

Subproblem 2

x + 5.5 = -4.153311931 Simplifying x + 5.5 = -4.153311931 Reorder the terms: 5.5 + x = -4.153311931 Solving 5.5 + x = -4.153311931 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 = -4.153311931 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -4.153311931 + -5.5 x = -4.153311931 + -5.5 Combine like terms: -4.153311931 + -5.5 = -9.653311931 x = -9.653311931 Simplifying x = -9.653311931

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.346688069, -9.653311931}

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