(x+4)(2x-1)=(-x-7)(4+x)

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Solution for (x+4)(2x-1)=(-x-7)(4+x) equation:


Simplifying
(x + 4)(2x + -1) = (-1x + -7)(4 + x)

Reorder the terms:
(4 + x)(2x + -1) = (-1x + -7)(4 + x)

Reorder the terms:
(4 + x)(-1 + 2x) = (-1x + -7)(4 + x)

Multiply (4 + x) * (-1 + 2x)
(4(-1 + 2x) + x(-1 + 2x)) = (-1x + -7)(4 + x)
((-1 * 4 + 2x * 4) + x(-1 + 2x)) = (-1x + -7)(4 + x)
((-4 + 8x) + x(-1 + 2x)) = (-1x + -7)(4 + x)
(-4 + 8x + (-1 * x + 2x * x)) = (-1x + -7)(4 + x)
(-4 + 8x + (-1x + 2x2)) = (-1x + -7)(4 + x)

Combine like terms: 8x + -1x = 7x
(-4 + 7x + 2x2) = (-1x + -7)(4 + x)

Reorder the terms:
-4 + 7x + 2x2 = (-7 + -1x)(4 + x)

Multiply (-7 + -1x) * (4 + x)
-4 + 7x + 2x2 = (-7(4 + x) + -1x * (4 + x))
-4 + 7x + 2x2 = ((4 * -7 + x * -7) + -1x * (4 + x))
-4 + 7x + 2x2 = ((-28 + -7x) + -1x * (4 + x))
-4 + 7x + 2x2 = (-28 + -7x + (4 * -1x + x * -1x))
-4 + 7x + 2x2 = (-28 + -7x + (-4x + -1x2))

Combine like terms: -7x + -4x = -11x
-4 + 7x + 2x2 = (-28 + -11x + -1x2)

Solving
-4 + 7x + 2x2 = -28 + -11x + -1x2

Solving for variable 'x'.

Reorder the terms:
-4 + 28 + 7x + 11x + 2x2 + x2 = -28 + -11x + -1x2 + 28 + 11x + x2

Combine like terms: -4 + 28 = 24
24 + 7x + 11x + 2x2 + x2 = -28 + -11x + -1x2 + 28 + 11x + x2

Combine like terms: 7x + 11x = 18x
24 + 18x + 2x2 + x2 = -28 + -11x + -1x2 + 28 + 11x + x2

Combine like terms: 2x2 + x2 = 3x2
24 + 18x + 3x2 = -28 + -11x + -1x2 + 28 + 11x + x2

Reorder the terms:
24 + 18x + 3x2 = -28 + 28 + -11x + 11x + -1x2 + x2

Combine like terms: -28 + 28 = 0
24 + 18x + 3x2 = 0 + -11x + 11x + -1x2 + x2
24 + 18x + 3x2 = -11x + 11x + -1x2 + x2

Combine like terms: -11x + 11x = 0
24 + 18x + 3x2 = 0 + -1x2 + x2
24 + 18x + 3x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
24 + 18x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(8 + 6x + x2) = 0

Factor a trinomial.
3((4 + x)(2 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 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 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-4, -2}

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