5(x-2)(x+4)=0

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Solution for 5(x-2)(x+4)=0 equation: 


Simplifying
5(x + -2)(x + 4) = 0

Reorder the terms:
5(-2 + x)(x + 4) = 0

Reorder the terms:
5(-2 + x)(4 + x) = 0

Multiply (-2 + x) * (4 + x)
5(-2(4 + x) + x(4 + x)) = 0
5((4 * -2 + x * -2) + x(4 + x)) = 0
5((-8 + -2x) + x(4 + x)) = 0
5(-8 + -2x + (4 * x + x * x)) = 0
5(-8 + -2x + (4x + x2)) = 0

Combine like terms: -2x + 4x = 2x
5(-8 + 2x + x2) = 0
(-8 * 5 + 2x * 5 + x2 * 5) = 0
(-40 + 10x + 5x2) = 0

Solving
-40 + 10x + 5x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-8 + 2x + x2) = 0

Factor a trinomial.
5((-4 + -1x)(2 + -1x)) = 0

Ignore the factor 5.

Subproblem 1
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

Subproblem 2
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
Solution
x = {-4, 2}

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