(x-3)(2x+8)=0

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Solution for (x-3)(2x+8)=0 equation:


Simplifying
(x + -3)(2x + 8) = 0

Reorder the terms:
(-3 + x)(2x + 8) = 0

Reorder the terms:
(-3 + x)(8 + 2x) = 0

Multiply (-3 + x) * (8 + 2x)
(-3(8 + 2x) + x(8 + 2x)) = 0
((8 * -3 + 2x * -3) + x(8 + 2x)) = 0
((-24 + -6x) + x(8 + 2x)) = 0
(-24 + -6x + (8 * x + 2x * x)) = 0
(-24 + -6x + (8x + 2x2)) = 0

Combine like terms: -6x + 8x = 2x
(-24 + 2x + 2x2) = 0

Solving
-24 + 2x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-12 + x + x2) = 0

Factor a trinomial.
2((-4 + -1x)(3 + -1x)) = 0

Ignore the factor 2.

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 '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-4, 3}

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