(x+6)(x+6)=72

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Solution for (x+6)(x+6)=72 equation:


Simplifying
(x + 6)(x + 6) = 72

Reorder the terms:
(6 + x)(x + 6) = 72

Reorder the terms:
(6 + x)(6 + x) = 72

Multiply (6 + x) * (6 + x)
(6(6 + x) + x(6 + x)) = 72
((6 * 6 + x * 6) + x(6 + x)) = 72
((36 + 6x) + x(6 + x)) = 72
(36 + 6x + (6 * x + x * x)) = 72
(36 + 6x + (6x + x2)) = 72

Combine like terms: 6x + 6x = 12x
(36 + 12x + x2) = 72

Solving
36 + 12x + x2 = 72

Solving for variable 'x'.

Reorder the terms:
36 + -72 + 12x + x2 = 72 + -72

Combine like terms: 36 + -72 = -36
-36 + 12x + x2 = 72 + -72

Combine like terms: 72 + -72 = 0
-36 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 12x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + 12x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 12x + x2 = 0 + 36
12x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
12x + x2 = 36

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 = 36 + 36

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

Combine like terms: 36 + 36 = 72
36 + 12x + x2 = 72

Factor a perfect square on the left side:
(x + 6)(x + 6) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(x + 6) equal to 8.485281374 and -8.485281374.

Subproblem 1

x + 6 = 8.485281374 Simplifying x + 6 = 8.485281374 Reorder the terms: 6 + x = 8.485281374 Solving 6 + x = 8.485281374 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 = 8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + x = 8.485281374 + -6 x = 8.485281374 + -6 Combine like terms: 8.485281374 + -6 = 2.485281374 x = 2.485281374 Simplifying x = 2.485281374

Subproblem 2

x + 6 = -8.485281374 Simplifying x + 6 = -8.485281374 Reorder the terms: 6 + x = -8.485281374 Solving 6 + x = -8.485281374 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 = -8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + x = -8.485281374 + -6 x = -8.485281374 + -6 Combine like terms: -8.485281374 + -6 = -14.485281374 x = -14.485281374 Simplifying x = -14.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.485281374, -14.485281374}

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