x^2+11x=3

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Solution for x^2+11x=3 equation:


Simplifying
x2 + 11x = 3

Reorder the terms:
11x + x2 = 3

Solving
11x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 11x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 11x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 11x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 11x + x2 = 0 + 3
11x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
11x + x2 = 3

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 = 3 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 3 + 30.25

Combine like terms: 3 + 30.25 = 33.25
30.25 + 11x + x2 = 33.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 33.25

Calculate the square root of the right side: 5.766281297

Break this problem into two subproblems by setting 
(x + 5.5) equal to 5.766281297 and -5.766281297.

Subproblem 1

x + 5.5 = 5.766281297 Simplifying x + 5.5 = 5.766281297 Reorder the terms: 5.5 + x = 5.766281297 Solving 5.5 + x = 5.766281297 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 = 5.766281297 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 5.766281297 + -5.5 x = 5.766281297 + -5.5 Combine like terms: 5.766281297 + -5.5 = 0.266281297 x = 0.266281297 Simplifying x = 0.266281297

Subproblem 2

x + 5.5 = -5.766281297 Simplifying x + 5.5 = -5.766281297 Reorder the terms: 5.5 + x = -5.766281297 Solving 5.5 + x = -5.766281297 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 = -5.766281297 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -5.766281297 + -5.5 x = -5.766281297 + -5.5 Combine like terms: -5.766281297 + -5.5 = -11.266281297 x = -11.266281297 Simplifying x = -11.266281297

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.266281297, -11.266281297}

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