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

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


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

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

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

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

Combine like terms: 4x + 4x = 8x
(16 + 8x + x2) = 12(12 + x)
16 + 8x + x2 = (12 * 12 + x * 12)
16 + 8x + x2 = (144 + 12x)

Solving
16 + 8x + x2 = 144 + 12x

Solving for variable 'x'.

Reorder the terms:
16 + -144 + 8x + -12x + x2 = 144 + 12x + -144 + -12x

Combine like terms: 16 + -144 = -128
-128 + 8x + -12x + x2 = 144 + 12x + -144 + -12x

Combine like terms: 8x + -12x = -4x
-128 + -4x + x2 = 144 + 12x + -144 + -12x

Reorder the terms:
-128 + -4x + x2 = 144 + -144 + 12x + -12x

Combine like terms: 144 + -144 = 0
-128 + -4x + x2 = 0 + 12x + -12x
-128 + -4x + x2 = 12x + -12x

Combine like terms: 12x + -12x = 0
-128 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '128' to each side of the equation.
-128 + -4x + 128 + x2 = 0 + 128

Reorder the terms:
-128 + 128 + -4x + x2 = 0 + 128

Combine like terms: -128 + 128 = 0
0 + -4x + x2 = 0 + 128
-4x + x2 = 0 + 128

Combine like terms: 0 + 128 = 128
-4x + x2 = 128

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 128 + 4

Reorder the terms:
4 + -4x + x2 = 128 + 4

Combine like terms: 128 + 4 = 132
4 + -4x + x2 = 132

Factor a perfect square on the left side:
(x + -2)(x + -2) = 132

Calculate the square root of the right side: 11.489125293

Break this problem into two subproblems by setting 
(x + -2) equal to 11.489125293 and -11.489125293.

Subproblem 1

x + -2 = 11.489125293 Simplifying x + -2 = 11.489125293 Reorder the terms: -2 + x = 11.489125293 Solving -2 + x = 11.489125293 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 11.489125293 + 2 Combine like terms: -2 + 2 = 0 0 + x = 11.489125293 + 2 x = 11.489125293 + 2 Combine like terms: 11.489125293 + 2 = 13.489125293 x = 13.489125293 Simplifying x = 13.489125293

Subproblem 2

x + -2 = -11.489125293 Simplifying x + -2 = -11.489125293 Reorder the terms: -2 + x = -11.489125293 Solving -2 + x = -11.489125293 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -11.489125293 + 2 Combine like terms: -2 + 2 = 0 0 + x = -11.489125293 + 2 x = -11.489125293 + 2 Combine like terms: -11.489125293 + 2 = -9.489125293 x = -9.489125293 Simplifying x = -9.489125293

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.489125293, -9.489125293}

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