(x+10)(x+10)-117=0

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Solution for (x+10)(x+10)-117=0 equation:


Simplifying
(x + 10)(x + 10) + -117 = 0

Reorder the terms:
(10 + x)(x + 10) + -117 = 0

Reorder the terms:
(10 + x)(10 + x) + -117 = 0

Multiply (10 + x) * (10 + x)
(10(10 + x) + x(10 + x)) + -117 = 0
((10 * 10 + x * 10) + x(10 + x)) + -117 = 0
((100 + 10x) + x(10 + x)) + -117 = 0
(100 + 10x + (10 * x + x * x)) + -117 = 0
(100 + 10x + (10x + x2)) + -117 = 0

Combine like terms: 10x + 10x = 20x
(100 + 20x + x2) + -117 = 0

Reorder the terms:
100 + -117 + 20x + x2 = 0

Combine like terms: 100 + -117 = -17
-17 + 20x + x2 = 0

Solving
-17 + 20x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + 20x + 17 + x2 = 0 + 17

Reorder the terms:
-17 + 17 + 20x + x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 20x + x2 = 0 + 17
20x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
20x + x2 = 17

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 = 17 + 100

Reorder the terms:
100 + 20x + x2 = 17 + 100

Combine like terms: 17 + 100 = 117
100 + 20x + x2 = 117

Factor a perfect square on the left side:
(x + 10)(x + 10) = 117

Calculate the square root of the right side: 10.816653826

Break this problem into two subproblems by setting 
(x + 10) equal to 10.816653826 and -10.816653826.

Subproblem 1

x + 10 = 10.816653826 Simplifying x + 10 = 10.816653826 Reorder the terms: 10 + x = 10.816653826 Solving 10 + x = 10.816653826 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 = 10.816653826 + -10 Combine like terms: 10 + -10 = 0 0 + x = 10.816653826 + -10 x = 10.816653826 + -10 Combine like terms: 10.816653826 + -10 = 0.816653826 x = 0.816653826 Simplifying x = 0.816653826

Subproblem 2

x + 10 = -10.816653826 Simplifying x + 10 = -10.816653826 Reorder the terms: 10 + x = -10.816653826 Solving 10 + x = -10.816653826 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 = -10.816653826 + -10 Combine like terms: 10 + -10 = 0 0 + x = -10.816653826 + -10 x = -10.816653826 + -10 Combine like terms: -10.816653826 + -10 = -20.816653826 x = -20.816653826 Simplifying x = -20.816653826

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.816653826, -20.816653826}

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