(x+4)(x+4)=12

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Solution for (x+4)(x+4)=12 equation:


Simplifying
(x + 4)(x + 4) = 12

Reorder the terms:
(4 + x)(x + 4) = 12

Reorder the terms:
(4 + x)(4 + x) = 12

Multiply (4 + x) * (4 + x)
(4(4 + x) + x(4 + x)) = 12
((4 * 4 + x * 4) + x(4 + x)) = 12
((16 + 4x) + x(4 + x)) = 12
(16 + 4x + (4 * x + x * x)) = 12
(16 + 4x + (4x + x2)) = 12

Combine like terms: 4x + 4x = 8x
(16 + 8x + x2) = 12

Solving
16 + 8x + x2 = 12

Solving for variable 'x'.

Reorder the terms:
16 + -12 + 8x + x2 = 12 + -12

Combine like terms: 16 + -12 = 4
4 + 8x + x2 = 12 + -12

Combine like terms: 12 + -12 = 0
4 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 8x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + 8x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 8x + x2 = 0 + -4
8x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
8x + x2 = -4

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -4 + 16

Reorder the terms:
16 + 8x + x2 = -4 + 16

Combine like terms: -4 + 16 = 12
16 + 8x + x2 = 12

Factor a perfect square on the left side:
(x + 4)(x + 4) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(x + 4) equal to 3.464101615 and -3.464101615.

Subproblem 1

x + 4 = 3.464101615 Simplifying x + 4 = 3.464101615 Reorder the terms: 4 + x = 3.464101615 Solving 4 + x = 3.464101615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 3.464101615 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3.464101615 + -4 x = 3.464101615 + -4 Combine like terms: 3.464101615 + -4 = -0.535898385 x = -0.535898385 Simplifying x = -0.535898385

Subproblem 2

x + 4 = -3.464101615 Simplifying x + 4 = -3.464101615 Reorder the terms: 4 + x = -3.464101615 Solving 4 + x = -3.464101615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -3.464101615 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3.464101615 + -4 x = -3.464101615 + -4 Combine like terms: -3.464101615 + -4 = -7.464101615 x = -7.464101615 Simplifying x = -7.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.535898385, -7.464101615}

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