(x+2)(2-x)=6x-x

Solution for (x+2)(2-x)=6x-x equation:

Simplifying
(x + 2)(2 + -1x) = 6x + -1x

Reorder the terms:
(2 + x)(2 + -1x) = 6x + -1x

Multiply (2 + x) * (2 + -1x)
(2(2 + -1x) + x(2 + -1x)) = 6x + -1x
((2 * 2 + -1x * 2) + x(2 + -1x)) = 6x + -1x
((4 + -2x) + x(2 + -1x)) = 6x + -1x
(4 + -2x + (2 * x + -1x * x)) = 6x + -1x
(4 + -2x + (2x + -1x2)) = 6x + -1x

Combine like terms: -2x + 2x = 0
(4 + 0 + -1x2) = 6x + -1x
(4 + -1x2) = 6x + -1x

Combine like terms: 6x + -1x = 5x
4 + -1x2 = 5x

Solving
4 + -1x2 = 5x

Solving for variable 'x'.

Reorder the terms:
4 + -5x + -1x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
4 + -5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-4 + 5x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 5x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 5x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 5x + x2 = 0 + 4
5x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
5x + x2 = 4

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 4 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 4 + 6.25

Combine like terms: 4 + 6.25 = 10.25
6.25 + 5x + x2 = 10.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(x + 2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1
x + 2.5 = 3.201562119

Simplifying
x + 2.5 = 3.201562119

Reorder the terms:
2.5 + x = 3.201562119

Solving
2.5 + x = 3.201562119

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.5' to each side of the equation.
2.5 + -2.5 + x = 3.201562119 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = 3.201562119 + -2.5
x = 3.201562119 + -2.5

Combine like terms: 3.201562119 + -2.5 = 0.701562119
x = 0.701562119

Simplifying
x = 0.701562119

Subproblem 2
x + 2.5 = -3.201562119

Simplifying
x + 2.5 = -3.201562119

Reorder the terms:
2.5 + x = -3.201562119

Solving
2.5 + x = -3.201562119

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.5' to each side of the equation.
2.5 + -2.5 + x = -3.201562119 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = -3.201562119 + -2.5
x = -3.201562119 + -2.5

Combine like terms: -3.201562119 + -2.5 = -5.701562119
x = -5.701562119

Simplifying
x = -5.701562119

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.701562119, -5.701562119}