(x+6)(x+6)=11

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Solution for (x+6)(x+6)=11 equation:


Simplifying
(x + 6)(x + 6) = 11

Reorder the terms:
(6 + x)(x + 6) = 11

Reorder the terms:
(6 + x)(6 + x) = 11

Multiply (6 + x) * (6 + x)
(6(6 + x) + x(6 + x)) = 11
((6 * 6 + x * 6) + x(6 + x)) = 11
((36 + 6x) + x(6 + x)) = 11
(36 + 6x + (6 * x + x * x)) = 11
(36 + 6x + (6x + x2)) = 11

Combine like terms: 6x + 6x = 12x
(36 + 12x + x2) = 11

Solving
36 + 12x + x2 = 11

Solving for variable 'x'.

Reorder the terms:
36 + -11 + 12x + x2 = 11 + -11

Combine like terms: 36 + -11 = 25
25 + 12x + x2 = 11 + -11

Combine like terms: 11 + -11 = 0
25 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 12x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + 12x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 12x + x2 = 0 + -25
12x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
12x + x2 = -25

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = -25 + 36

Reorder the terms:
36 + 12x + x2 = -25 + 36

Combine like terms: -25 + 36 = 11
36 + 12x + x2 = 11

Factor a perfect square on the left side:
(x + 6)(x + 6) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + 6) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + 6 = 3.31662479 Simplifying x + 6 = 3.31662479 Reorder the terms: 6 + x = 3.31662479 Solving 6 + x = 3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 3.31662479 + -6 Combine like terms: 6 + -6 = 0 0 + x = 3.31662479 + -6 x = 3.31662479 + -6 Combine like terms: 3.31662479 + -6 = -2.68337521 x = -2.68337521 Simplifying x = -2.68337521

Subproblem 2

x + 6 = -3.31662479 Simplifying x + 6 = -3.31662479 Reorder the terms: 6 + x = -3.31662479 Solving 6 + x = -3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -3.31662479 + -6 Combine like terms: 6 + -6 = 0 0 + x = -3.31662479 + -6 x = -3.31662479 + -6 Combine like terms: -3.31662479 + -6 = -9.31662479 x = -9.31662479 Simplifying x = -9.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.68337521, -9.31662479}

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