4d(d+9)=

Solution for 4d(d+9)= equation:

Simplifying
4d(d + 9) = 0

Reorder the terms:
4d(9 + d) = 0
(9 * 4d + d * 4d) = 0
(36d + 4d2) = 0

Solving
36d + 4d2 = 0

Solving for variable 'd'.

Factor out the Greatest Common Factor (GCF), '4d'.
4d(9 + d) = 0

Ignore the factor 4.
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 '(9 + d)' equal to zero and attempt to solve:

Simplifying
9 + d = 0

Solving
9 + d = 0

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

Add '-9' to each side of the equation.
9 + -9 + d = 0 + -9

Combine like terms: 9 + -9 = 0
0 + d = 0 + -9
d = 0 + -9

Combine like terms: 0 + -9 = -9
d = -9

Simplifying
d = -9
Solution
d = {0, -9}