3d(d+4)=

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Solution for 3d(d+4)= equation: 


Simplifying
3d(d + 4) = 0

Reorder the terms:
3d(4 + d) = 0
(4 * 3d + d * 3d) = 0
(12d + 3d2) = 0

Solving
12d + 3d2 = 0

Solving for variable 'd'.

Factor out the Greatest Common Factor (GCF), '3d'.
3d(4 + d) = 0

Ignore the factor 3.

Subproblem 1
Set the factor 'd' equal to zero and attempt to solve:

Simplifying
d = 0

Solving
d = 0

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

Simplifying
d = 0

Subproblem 2
Set the factor '(4 + d)' equal to zero and attempt to solve:

Simplifying
4 + d = 0

Solving
4 + d = 0

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

Add '-4' to each side of the equation.
4 + -4 + d = 0 + -4

Combine like terms: 4 + -4 = 0
0 + d = 0 + -4
d = 0 + -4

Combine like terms: 0 + -4 = -4
d = -4

Simplifying
d = -4
Solution
d = {0, -4}

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