(2x-4)(x+20)=0

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Solution for (2x-4)(x+20)=0 equation:


Simplifying
(2x + -4)(x + 20) = 0

Reorder the terms:
(-4 + 2x)(x + 20) = 0

Reorder the terms:
(-4 + 2x)(20 + x) = 0

Multiply (-4 + 2x) * (20 + x)
(-4(20 + x) + 2x * (20 + x)) = 0
((20 * -4 + x * -4) + 2x * (20 + x)) = 0
((-80 + -4x) + 2x * (20 + x)) = 0
(-80 + -4x + (20 * 2x + x * 2x)) = 0
(-80 + -4x + (40x + 2x2)) = 0

Combine like terms: -4x + 40x = 36x
(-80 + 36x + 2x2) = 0

Solving
-80 + 36x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-40 + 18x + x2) = 0

Factor a trinomial.
2((-20 + -1x)(2 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-20 + -1x)' equal to zero and attempt to solve: Simplifying -20 + -1x = 0 Solving -20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -1x = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -1x = 0 + 20 -1x = 0 + 20 Combine like terms: 0 + 20 = 20 -1x = 20 Divide each side by '-1'. x = -20 Simplifying x = -20

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 = {-20, 2}

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