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

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

Simplifying
(x2 + -2x) = (x + 4)

Reorder the terms:
(-2x + x2) = (x + 4)

Remove parenthesis around (-2x + x2)
-2x + x2 = (x + 4)

Reorder the terms:
-2x + x2 = (4 + x)

Remove parenthesis around (4 + x)
-2x + x2 = 4 + x

Solving
-2x + x2 = 4 + x

Solving for variable 'x'.

Reorder the terms:
-4 + -2x + -1x + x2 = 4 + x + -4 + -1x

Combine like terms: -2x + -1x = -3x
-4 + -3x + x2 = 4 + x + -4 + -1x

Reorder the terms:
-4 + -3x + x2 = 4 + -4 + x + -1x

Combine like terms: 4 + -4 = 0
-4 + -3x + x2 = 0 + x + -1x
-4 + -3x + x2 = x + -1x

Combine like terms: x + -1x = 0
-4 + -3x + x2 = 0

Factor a trinomial.
(-1 + -1x)(4 + -1x) = 0

Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve:

Simplifying
-1 + -1x = 0

Solving
-1 + -1x = 0

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

Add '1' to each side of the equation.
-1 + 1 + -1x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1x = 0 + 1
-1x = 0 + 1

Combine like terms: 0 + 1 = 1
-1x = 1

Divide each side by '-1'.
x = -1

Simplifying
x = -1
Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

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

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

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-1, 4}