(x-5)(2x+4)=(x+5)(x-4)

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Solution for (x-5)(2x+4)=(x+5)(x-4) equation:


Simplifying
(x + -5)(2x + 4) = (x + 5)(x + -4)

Reorder the terms:
(-5 + x)(2x + 4) = (x + 5)(x + -4)

Reorder the terms:
(-5 + x)(4 + 2x) = (x + 5)(x + -4)

Multiply (-5 + x) * (4 + 2x)
(-5(4 + 2x) + x(4 + 2x)) = (x + 5)(x + -4)
((4 * -5 + 2x * -5) + x(4 + 2x)) = (x + 5)(x + -4)
((-20 + -10x) + x(4 + 2x)) = (x + 5)(x + -4)
(-20 + -10x + (4 * x + 2x * x)) = (x + 5)(x + -4)
(-20 + -10x + (4x + 2x2)) = (x + 5)(x + -4)

Combine like terms: -10x + 4x = -6x
(-20 + -6x + 2x2) = (x + 5)(x + -4)

Reorder the terms:
-20 + -6x + 2x2 = (5 + x)(x + -4)

Reorder the terms:
-20 + -6x + 2x2 = (5 + x)(-4 + x)

Multiply (5 + x) * (-4 + x)
-20 + -6x + 2x2 = (5(-4 + x) + x(-4 + x))
-20 + -6x + 2x2 = ((-4 * 5 + x * 5) + x(-4 + x))
-20 + -6x + 2x2 = ((-20 + 5x) + x(-4 + x))
-20 + -6x + 2x2 = (-20 + 5x + (-4 * x + x * x))
-20 + -6x + 2x2 = (-20 + 5x + (-4x + x2))

Combine like terms: 5x + -4x = 1x
-20 + -6x + 2x2 = (-20 + 1x + x2)

Add '20' to each side of the equation.
-20 + -6x + 20 + 2x2 = -20 + 1x + 20 + x2

Reorder the terms:
-20 + 20 + -6x + 2x2 = -20 + 1x + 20 + x2

Combine like terms: -20 + 20 = 0
0 + -6x + 2x2 = -20 + 1x + 20 + x2
-6x + 2x2 = -20 + 1x + 20 + x2

Reorder the terms:
-6x + 2x2 = -20 + 20 + 1x + x2

Combine like terms: -20 + 20 = 0
-6x + 2x2 = 0 + 1x + x2
-6x + 2x2 = 1x + x2

Solving
-6x + 2x2 = 1x + x2

Solving for variable 'x'.

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

Combine like terms: -6x + -1x = -7x
-7x + 2x2 + -1x2 = 1x + x2 + -1x + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
-7x + 1x2 = 1x + x2 + -1x + -1x2

Reorder the terms:
-7x + 1x2 = 1x + -1x + x2 + -1x2

Combine like terms: 1x + -1x = 0
-7x + 1x2 = 0 + x2 + -1x2
-7x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-7x + 1x2 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-7 + x) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-7 + x)' equal to zero and attempt to solve: Simplifying -7 + x = 0 Solving -7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + x = 0 + 7 x = 0 + 7 Combine like terms: 0 + 7 = 7 x = 7 Simplifying x = 7

Solution

x = {0, 7}

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