(x-1)(x+4)=(x-5)

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Solution for (x-1)(x+4)=(x-5) equation:


Simplifying
(x + -1)(x + 4) = (x + -5)

Reorder the terms:
(-1 + x)(x + 4) = (x + -5)

Reorder the terms:
(-1 + x)(4 + x) = (x + -5)

Multiply (-1 + x) * (4 + x)
(-1(4 + x) + x(4 + x)) = (x + -5)
((4 * -1 + x * -1) + x(4 + x)) = (x + -5)
((-4 + -1x) + x(4 + x)) = (x + -5)
(-4 + -1x + (4 * x + x * x)) = (x + -5)
(-4 + -1x + (4x + x2)) = (x + -5)

Combine like terms: -1x + 4x = 3x
(-4 + 3x + x2) = (x + -5)

Reorder the terms:
-4 + 3x + x2 = (-5 + x)

Remove parenthesis around (-5 + x)
-4 + 3x + x2 = -5 + x

Solving
-4 + 3x + x2 = -5 + x

Solving for variable 'x'.

Reorder the terms:
-4 + 5 + 3x + -1x + x2 = -5 + x + 5 + -1x

Combine like terms: -4 + 5 = 1
1 + 3x + -1x + x2 = -5 + x + 5 + -1x

Combine like terms: 3x + -1x = 2x
1 + 2x + x2 = -5 + x + 5 + -1x

Reorder the terms:
1 + 2x + x2 = -5 + 5 + x + -1x

Combine like terms: -5 + 5 = 0
1 + 2x + x2 = 0 + x + -1x
1 + 2x + x2 = x + -1x

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

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

Subproblem 1

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-1, -1}

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