(8-x)*(3x+9)=0

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Solution for (8-x)*(3x+9)=0 equation:


Simplifying
(8 + -1x)(3x + 9) = 0

Reorder the terms:
(8 + -1x)(9 + 3x) = 0

Multiply (8 + -1x) * (9 + 3x)
(8(9 + 3x) + -1x * (9 + 3x)) = 0
((9 * 8 + 3x * 8) + -1x * (9 + 3x)) = 0
((72 + 24x) + -1x * (9 + 3x)) = 0
(72 + 24x + (9 * -1x + 3x * -1x)) = 0
(72 + 24x + (-9x + -3x2)) = 0

Combine like terms: 24x + -9x = 15x
(72 + 15x + -3x2) = 0

Solving
72 + 15x + -3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(24 + 5x + -1x2) = 0

Factor a trinomial.
3((8 + -1x)(3 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {8, -3}

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