x^2+11x-2.75=0

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Solution for x^2+11x-2.75=0 equation:


Simplifying
x2 + 11x + -2.75 = 0

Reorder the terms:
-2.75 + 11x + x2 = 0

Solving
-2.75 + 11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2.75' to each side of the equation.
-2.75 + 11x + 2.75 + x2 = 0 + 2.75

Reorder the terms:
-2.75 + 2.75 + 11x + x2 = 0 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + 11x + x2 = 0 + 2.75
11x + x2 = 0 + 2.75

Combine like terms: 0 + 2.75 = 2.75
11x + x2 = 2.75

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 = 2.75 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 2.75 + 30.25

Combine like terms: 2.75 + 30.25 = 33
30.25 + 11x + x2 = 33

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 33

Calculate the square root of the right side: 5.744562647

Break this problem into two subproblems by setting 
(x + 5.5) equal to 5.744562647 and -5.744562647.

Subproblem 1

x + 5.5 = 5.744562647 Simplifying x + 5.5 = 5.744562647 Reorder the terms: 5.5 + x = 5.744562647 Solving 5.5 + x = 5.744562647 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 = 5.744562647 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 5.744562647 + -5.5 x = 5.744562647 + -5.5 Combine like terms: 5.744562647 + -5.5 = 0.244562647 x = 0.244562647 Simplifying x = 0.244562647

Subproblem 2

x + 5.5 = -5.744562647 Simplifying x + 5.5 = -5.744562647 Reorder the terms: 5.5 + x = -5.744562647 Solving 5.5 + x = -5.744562647 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 = -5.744562647 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -5.744562647 + -5.5 x = -5.744562647 + -5.5 Combine like terms: -5.744562647 + -5.5 = -11.244562647 x = -11.244562647 Simplifying x = -11.244562647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.244562647, -11.244562647}

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