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

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


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

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

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

Multiply (10 + x) * (-2 + x)
(10(-2 + x) + x(-2 + x)) = (x + 2) * 2
((-2 * 10 + x * 10) + x(-2 + x)) = (x + 2) * 2
((-20 + 10x) + x(-2 + x)) = (x + 2) * 2
(-20 + 10x + (-2 * x + x * x)) = (x + 2) * 2
(-20 + 10x + (-2x + x2)) = (x + 2) * 2

Combine like terms: 10x + -2x = 8x
(-20 + 8x + x2) = (x + 2) * 2

Reorder the terms:
-20 + 8x + x2 = (2 + x) * 2

Reorder the terms for easier multiplication:
-20 + 8x + x2 = 2(2 + x)
-20 + 8x + x2 = (2 * 2 + x * 2)
-20 + 8x + x2 = (4 + 2x)

Solving
-20 + 8x + x2 = 4 + 2x

Solving for variable 'x'.

Reorder the terms:
-20 + -4 + 8x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: -20 + -4 = -24
-24 + 8x + -2x + x2 = 4 + 2x + -4 + -2x

Combine like terms: 8x + -2x = 6x
-24 + 6x + x2 = 4 + 2x + -4 + -2x

Reorder the terms:
-24 + 6x + x2 = 4 + -4 + 2x + -2x

Combine like terms: 4 + -4 = 0
-24 + 6x + x2 = 0 + 2x + -2x
-24 + 6x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-24 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + 6x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + 6x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 6x + x2 = 0 + 24
6x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
6x + x2 = 24

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 24 + 9

Reorder the terms:
9 + 6x + x2 = 24 + 9

Combine like terms: 24 + 9 = 33
9 + 6x + x2 = 33

Factor a perfect square on the left side:
(x + 3)(x + 3) = 33

Calculate the square root of the right side: 5.744562647

Break this problem into two subproblems by setting 
(x + 3) equal to 5.744562647 and -5.744562647.

Subproblem 1

x + 3 = 5.744562647 Simplifying x + 3 = 5.744562647 Reorder the terms: 3 + x = 5.744562647 Solving 3 + x = 5.744562647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 5.744562647 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.744562647 + -3 x = 5.744562647 + -3 Combine like terms: 5.744562647 + -3 = 2.744562647 x = 2.744562647 Simplifying x = 2.744562647

Subproblem 2

x + 3 = -5.744562647 Simplifying x + 3 = -5.744562647 Reorder the terms: 3 + x = -5.744562647 Solving 3 + x = -5.744562647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -5.744562647 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.744562647 + -3 x = -5.744562647 + -3 Combine like terms: -5.744562647 + -3 = -8.744562647 x = -8.744562647 Simplifying x = -8.744562647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.744562647, -8.744562647}

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