(3u+2)(9+u)=0

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

Simplifying
(3u + 2)(9 + u) = 0

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

Multiply (2 + 3u) * (9 + u)
(2(9 + u) + 3u * (9 + u)) = 0
((9 * 2 + u * 2) + 3u * (9 + u)) = 0
((18 + 2u) + 3u * (9 + u)) = 0
(18 + 2u + (9 * 3u + u * 3u)) = 0
(18 + 2u + (27u + 3u2)) = 0

Combine like terms: 2u + 27u = 29u
(18 + 29u + 3u2) = 0

Solving
18 + 29u + 3u2 = 0

Solving for variable 'u'.

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

Subproblem 1
Set the factor '(9 + u)' equal to zero and attempt to solve:

Simplifying
9 + u = 0

Solving
9 + u = 0

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

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

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

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

Simplifying
u = -9
Subproblem 2
Set the factor '(2 + 3u)' equal to zero and attempt to solve:

Simplifying
2 + 3u = 0

Solving
2 + 3u = 0

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

Add '-2' to each side of the equation.
2 + -2 + 3u = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 3u = 0 + -2
3u = 0 + -2

Combine like terms: 0 + -2 = -2
3u = -2

Divide each side by '3'.
u = -0.6666666667

Simplifying
u = -0.6666666667
Solution
u = {-9, -0.6666666667}