(x+8)(x+12)=234

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Solution for (x+8)(x+12)=234 equation:


Simplifying
(x + 8)(x + 12) = 234

Reorder the terms:
(8 + x)(x + 12) = 234

Reorder the terms:
(8 + x)(12 + x) = 234

Multiply (8 + x) * (12 + x)
(8(12 + x) + x(12 + x)) = 234
((12 * 8 + x * 8) + x(12 + x)) = 234
((96 + 8x) + x(12 + x)) = 234
(96 + 8x + (12 * x + x * x)) = 234
(96 + 8x + (12x + x2)) = 234

Combine like terms: 8x + 12x = 20x
(96 + 20x + x2) = 234

Solving
96 + 20x + x2 = 234

Solving for variable 'x'.

Reorder the terms:
96 + -234 + 20x + x2 = 234 + -234

Combine like terms: 96 + -234 = -138
-138 + 20x + x2 = 234 + -234

Combine like terms: 234 + -234 = 0
-138 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '138' to each side of the equation.
-138 + 20x + 138 + x2 = 0 + 138

Reorder the terms:
-138 + 138 + 20x + x2 = 0 + 138

Combine like terms: -138 + 138 = 0
0 + 20x + x2 = 0 + 138
20x + x2 = 0 + 138

Combine like terms: 0 + 138 = 138
20x + x2 = 138

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 = 138 + 100

Reorder the terms:
100 + 20x + x2 = 138 + 100

Combine like terms: 138 + 100 = 238
100 + 20x + x2 = 238

Factor a perfect square on the left side:
(x + 10)(x + 10) = 238

Calculate the square root of the right side: 15.427248621

Break this problem into two subproblems by setting 
(x + 10) equal to 15.427248621 and -15.427248621.

Subproblem 1

x + 10 = 15.427248621 Simplifying x + 10 = 15.427248621 Reorder the terms: 10 + x = 15.427248621 Solving 10 + x = 15.427248621 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 = 15.427248621 + -10 Combine like terms: 10 + -10 = 0 0 + x = 15.427248621 + -10 x = 15.427248621 + -10 Combine like terms: 15.427248621 + -10 = 5.427248621 x = 5.427248621 Simplifying x = 5.427248621

Subproblem 2

x + 10 = -15.427248621 Simplifying x + 10 = -15.427248621 Reorder the terms: 10 + x = -15.427248621 Solving 10 + x = -15.427248621 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 = -15.427248621 + -10 Combine like terms: 10 + -10 = 0 0 + x = -15.427248621 + -10 x = -15.427248621 + -10 Combine like terms: -15.427248621 + -10 = -25.427248621 x = -25.427248621 Simplifying x = -25.427248621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.427248621, -25.427248621}

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