(x+10)(x+10)=11

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Solution for (x+10)(x+10)=11 equation:


Simplifying
(x + 10)(x + 10) = 11

Reorder the terms:
(10 + x)(x + 10) = 11

Reorder the terms:
(10 + x)(10 + x) = 11

Multiply (10 + x) * (10 + x)
(10(10 + x) + x(10 + x)) = 11
((10 * 10 + x * 10) + x(10 + x)) = 11
((100 + 10x) + x(10 + x)) = 11
(100 + 10x + (10 * x + x * x)) = 11
(100 + 10x + (10x + x2)) = 11

Combine like terms: 10x + 10x = 20x
(100 + 20x + x2) = 11

Solving
100 + 20x + x2 = 11

Solving for variable 'x'.

Reorder the terms:
100 + -11 + 20x + x2 = 11 + -11

Combine like terms: 100 + -11 = 89
89 + 20x + x2 = 11 + -11

Combine like terms: 11 + -11 = 0
89 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-89' to each side of the equation.
89 + 20x + -89 + x2 = 0 + -89

Reorder the terms:
89 + -89 + 20x + x2 = 0 + -89

Combine like terms: 89 + -89 = 0
0 + 20x + x2 = 0 + -89
20x + x2 = 0 + -89

Combine like terms: 0 + -89 = -89
20x + x2 = -89

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = -89 + 100

Reorder the terms:
100 + 20x + x2 = -89 + 100

Combine like terms: -89 + 100 = 11
100 + 20x + x2 = 11

Factor a perfect square on the left side:
(x + 10)(x + 10) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + 10) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + 10 = 3.31662479 Simplifying x + 10 = 3.31662479 Reorder the terms: 10 + x = 3.31662479 Solving 10 + x = 3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 3.31662479 + -10 Combine like terms: 10 + -10 = 0 0 + x = 3.31662479 + -10 x = 3.31662479 + -10 Combine like terms: 3.31662479 + -10 = -6.68337521 x = -6.68337521 Simplifying x = -6.68337521

Subproblem 2

x + 10 = -3.31662479 Simplifying x + 10 = -3.31662479 Reorder the terms: 10 + x = -3.31662479 Solving 10 + x = -3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -3.31662479 + -10 Combine like terms: 10 + -10 = 0 0 + x = -3.31662479 + -10 x = -3.31662479 + -10 Combine like terms: -3.31662479 + -10 = -13.31662479 x = -13.31662479 Simplifying x = -13.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-6.68337521, -13.31662479}

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