(x+12)(x+2)=168

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Solution for (x+12)(x+2)=168 equation:


Simplifying
(x + 12)(x + 2) = 168

Reorder the terms:
(12 + x)(x + 2) = 168

Reorder the terms:
(12 + x)(2 + x) = 168

Multiply (12 + x) * (2 + x)
(12(2 + x) + x(2 + x)) = 168
((2 * 12 + x * 12) + x(2 + x)) = 168
((24 + 12x) + x(2 + x)) = 168
(24 + 12x + (2 * x + x * x)) = 168
(24 + 12x + (2x + x2)) = 168

Combine like terms: 12x + 2x = 14x
(24 + 14x + x2) = 168

Solving
24 + 14x + x2 = 168

Solving for variable 'x'.

Reorder the terms:
24 + -168 + 14x + x2 = 168 + -168

Combine like terms: 24 + -168 = -144
-144 + 14x + x2 = 168 + -168

Combine like terms: 168 + -168 = 0
-144 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 14x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 14x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 14x + x2 = 0 + 144
14x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
14x + x2 = 144

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 144 + 49

Reorder the terms:
49 + 14x + x2 = 144 + 49

Combine like terms: 144 + 49 = 193
49 + 14x + x2 = 193

Factor a perfect square on the left side:
(x + 7)(x + 7) = 193

Calculate the square root of the right side: 13.892443989

Break this problem into two subproblems by setting 
(x + 7) equal to 13.892443989 and -13.892443989.

Subproblem 1

x + 7 = 13.892443989 Simplifying x + 7 = 13.892443989 Reorder the terms: 7 + x = 13.892443989 Solving 7 + x = 13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 13.892443989 + -7 Combine like terms: 7 + -7 = 0 0 + x = 13.892443989 + -7 x = 13.892443989 + -7 Combine like terms: 13.892443989 + -7 = 6.892443989 x = 6.892443989 Simplifying x = 6.892443989

Subproblem 2

x + 7 = -13.892443989 Simplifying x + 7 = -13.892443989 Reorder the terms: 7 + x = -13.892443989 Solving 7 + x = -13.892443989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -13.892443989 + -7 Combine like terms: 7 + -7 = 0 0 + x = -13.892443989 + -7 x = -13.892443989 + -7 Combine like terms: -13.892443989 + -7 = -20.892443989 x = -20.892443989 Simplifying x = -20.892443989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.892443989, -20.892443989}

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