(x+1)(x-2)=(2x+4)(x-2)

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Solution for (x+1)(x-2)=(2x+4)(x-2) equation: 


Simplifying
(x + 1)(x + -2) = (2x + 4)(x + -2)

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

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

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

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

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

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

Multiply (4 + 2x) * (-2 + x)
-2 + -1x + x2 = (4(-2 + x) + 2x * (-2 + x))
-2 + -1x + x2 = ((-2 * 4 + x * 4) + 2x * (-2 + x))
-2 + -1x + x2 = ((-8 + 4x) + 2x * (-2 + x))
-2 + -1x + x2 = (-8 + 4x + (-2 * 2x + x * 2x))
-2 + -1x + x2 = (-8 + 4x + (-4x + 2x2))

Combine like terms: 4x + -4x = 0
-2 + -1x + x2 = (-8 + 0 + 2x2)
-2 + -1x + x2 = (-8 + 2x2)

Solving
-2 + -1x + x2 = -8 + 2x2

Solving for variable 'x'.

Reorder the terms:
-2 + 8 + -1x + x2 + -2x2 = -8 + 2x2 + 8 + -2x2

Combine like terms: -2 + 8 = 6
6 + -1x + x2 + -2x2 = -8 + 2x2 + 8 + -2x2

Combine like terms: x2 + -2x2 = -1x2
6 + -1x + -1x2 = -8 + 2x2 + 8 + -2x2

Reorder the terms:
6 + -1x + -1x2 = -8 + 8 + 2x2 + -2x2

Combine like terms: -8 + 8 = 0
6 + -1x + -1x2 = 0 + 2x2 + -2x2
6 + -1x + -1x2 = 2x2 + -2x2

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

Factor a trinomial.
(2 + -1x)(3 + x) = 0


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

Simplifying
2 + -1x = 0

Solving
2 + -1x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 0 + -2
-1x = 0 + -2

Combine like terms: 0 + -2 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2

Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 0

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 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + x = 0 + -3
x = 0 + -3

Combine like terms: 0 + -3 = -3
x = -3

Simplifying
x = -3
Solution
x = {2, -3}

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