(3x+6)(9+2x)=0

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Solution for (3x+6)(9+2x)=0 equation:


Simplifying
(3x + 6)(9 + 2x) = 0

Reorder the terms:
(6 + 3x)(9 + 2x) = 0

Multiply (6 + 3x) * (9 + 2x)
(6(9 + 2x) + 3x * (9 + 2x)) = 0
((9 * 6 + 2x * 6) + 3x * (9 + 2x)) = 0
((54 + 12x) + 3x * (9 + 2x)) = 0
(54 + 12x + (9 * 3x + 2x * 3x)) = 0
(54 + 12x + (27x + 6x2)) = 0

Combine like terms: 12x + 27x = 39x
(54 + 39x + 6x2) = 0

Solving
54 + 39x + 6x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(18 + 13x + 2x2) = 0

Factor a trinomial.
3((9 + 2x)(2 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(9 + 2x)' equal to zero and attempt to solve: Simplifying 9 + 2x = 0 Solving 9 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 0 + -9 2x = 0 + -9 Combine like terms: 0 + -9 = -9 2x = -9 Divide each side by '2'. x = -4.5 Simplifying x = -4.5

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 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 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-4.5, -2}

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