(x+8)(x-2)=(x+2)2

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Solution for (x+8)(x-2)=(x+2)2 equation:


Simplifying
(x + 8)(x + -2) = (x + 2) * 2

Reorder the terms:
(8 + x)(x + -2) = (x + 2) * 2

Reorder the terms:
(8 + x)(-2 + x) = (x + 2) * 2

Multiply (8 + x) * (-2 + x)
(8(-2 + x) + x(-2 + x)) = (x + 2) * 2
((-2 * 8 + x * 8) + x(-2 + x)) = (x + 2) * 2
((-16 + 8x) + x(-2 + x)) = (x + 2) * 2
(-16 + 8x + (-2 * x + x * x)) = (x + 2) * 2
(-16 + 8x + (-2x + x2)) = (x + 2) * 2

Combine like terms: 8x + -2x = 6x
(-16 + 6x + x2) = (x + 2) * 2

Reorder the terms:
-16 + 6x + x2 = (2 + x) * 2

Reorder the terms for easier multiplication:
-16 + 6x + x2 = 2(2 + x)
-16 + 6x + x2 = (2 * 2 + x * 2)
-16 + 6x + x2 = (4 + 2x)

Solving
-16 + 6x + x2 = 4 + 2x

Solving for variable 'x'.

Reorder the terms:
-16 + -4 + 6x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: -16 + -4 = -20
-20 + 6x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: 6x + -2x = 4x
-20 + 4x + x2 = 4 + 2x + -4 + -2x

Reorder the terms:
-20 + 4x + x2 = 4 + -4 + 2x + -2x

Combine like terms: 4 + -4 = 0
-20 + 4x + x2 = 0 + 2x + -2x
-20 + 4x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-20 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + 4x + 20 + x2 = 0 + 20

Reorder the terms:
-20 + 20 + 4x + x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 4x + x2 = 0 + 20
4x + x2 = 0 + 20

Combine like terms: 0 + 20 = 20
4x + x2 = 20

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 = 20 + 4

Reorder the terms:
4 + 4x + x2 = 20 + 4

Combine like terms: 20 + 4 = 24
4 + 4x + x2 = 24

Factor a perfect square on the left side:
(x + 2)(x + 2) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + 2) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + 2 = 4.898979486 Simplifying x + 2 = 4.898979486 Reorder the terms: 2 + x = 4.898979486 Solving 2 + x = 4.898979486 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 = 4.898979486 + -2 Combine like terms: 2 + -2 = 0 0 + x = 4.898979486 + -2 x = 4.898979486 + -2 Combine like terms: 4.898979486 + -2 = 2.898979486 x = 2.898979486 Simplifying x = 2.898979486

Subproblem 2

x + 2 = -4.898979486 Simplifying x + 2 = -4.898979486 Reorder the terms: 2 + x = -4.898979486 Solving 2 + x = -4.898979486 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 = -4.898979486 + -2 Combine like terms: 2 + -2 = 0 0 + x = -4.898979486 + -2 x = -4.898979486 + -2 Combine like terms: -4.898979486 + -2 = -6.898979486 x = -6.898979486 Simplifying x = -6.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.898979486, -6.898979486}

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