(3x+6)(x+6)=

Solution for (3x+6)(x+6)= equation:

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

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

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

Multiply (6 + 3x) * (6 + x)
(6(6 + x) + 3x * (6 + x)) = 0
((6 * 6 + x * 6) + 3x * (6 + x)) = 0
((36 + 6x) + 3x * (6 + x)) = 0
(36 + 6x + (6 * 3x + x * 3x)) = 0
(36 + 6x + (18x + 3x2)) = 0

Combine like terms: 6x + 18x = 24x
(36 + 24x + 3x2) = 0

Solving
36 + 24x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(12 + 8x + x2) = 0

Factor a trinomial.
3((6 + x)(2 + x)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(6 + x)' equal to zero and attempt to solve:

Simplifying
6 + x = 0

Solving
6 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + x = 0 + -6
x = 0 + -6

Combine like terms: 0 + -6 = -6
x = -6

Simplifying
x = -6
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 = {-6, -2}