(x+10)(x-4)=(x+2)2

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Solution for (x+10)(x-4)=(x+2)2 equation:


Simplifying
(x + 10)(x + -4) = (x + 2) * 2

Reorder the terms:
(10 + x)(x + -4) = (x + 2) * 2

Reorder the terms:
(10 + x)(-4 + x) = (x + 2) * 2

Multiply (10 + x) * (-4 + x)
(10(-4 + x) + x(-4 + x)) = (x + 2) * 2
((-4 * 10 + x * 10) + x(-4 + x)) = (x + 2) * 2
((-40 + 10x) + x(-4 + x)) = (x + 2) * 2
(-40 + 10x + (-4 * x + x * x)) = (x + 2) * 2
(-40 + 10x + (-4x + x2)) = (x + 2) * 2

Combine like terms: 10x + -4x = 6x
(-40 + 6x + x2) = (x + 2) * 2

Reorder the terms:
-40 + 6x + x2 = (2 + x) * 2

Reorder the terms for easier multiplication:
-40 + 6x + x2 = 2(2 + x)
-40 + 6x + x2 = (2 * 2 + x * 2)
-40 + 6x + x2 = (4 + 2x)

Solving
-40 + 6x + x2 = 4 + 2x

Solving for variable 'x'.

Reorder the terms:
-40 + -4 + 6x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: -40 + -4 = -44
-44 + 6x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: 6x + -2x = 4x
-44 + 4x + x2 = 4 + 2x + -4 + -2x

Reorder the terms:
-44 + 4x + x2 = 4 + -4 + 2x + -2x

Combine like terms: 4 + -4 = 0
-44 + 4x + x2 = 0 + 2x + -2x
-44 + 4x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-44 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '44' to each side of the equation.
-44 + 4x + 44 + x2 = 0 + 44

Reorder the terms:
-44 + 44 + 4x + x2 = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 4x + x2 = 0 + 44
4x + x2 = 0 + 44

Combine like terms: 0 + 44 = 44
4x + x2 = 44

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 = 44 + 4

Reorder the terms:
4 + 4x + x2 = 44 + 4

Combine like terms: 44 + 4 = 48
4 + 4x + x2 = 48

Factor a perfect square on the left side:
(x + 2)(x + 2) = 48

Calculate the square root of the right side: 6.92820323

Break this problem into two subproblems by setting 
(x + 2) equal to 6.92820323 and -6.92820323.

Subproblem 1

x + 2 = 6.92820323 Simplifying x + 2 = 6.92820323 Reorder the terms: 2 + x = 6.92820323 Solving 2 + x = 6.92820323 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 = 6.92820323 + -2 Combine like terms: 2 + -2 = 0 0 + x = 6.92820323 + -2 x = 6.92820323 + -2 Combine like terms: 6.92820323 + -2 = 4.92820323 x = 4.92820323 Simplifying x = 4.92820323

Subproblem 2

x + 2 = -6.92820323 Simplifying x + 2 = -6.92820323 Reorder the terms: 2 + x = -6.92820323 Solving 2 + x = -6.92820323 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 = -6.92820323 + -2 Combine like terms: 2 + -2 = 0 0 + x = -6.92820323 + -2 x = -6.92820323 + -2 Combine like terms: -6.92820323 + -2 = -8.92820323 x = -8.92820323 Simplifying x = -8.92820323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.92820323, -8.92820323}

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