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

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

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

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

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

Combine like terms: -3u + 18u = 15u
(-27 + 15u + 2u2) = 0

Solving
-27 + 15u + 2u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-9 + -1u)(3 + -2u) = 0

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

Simplifying
-9 + -1u = 0

Solving
-9 + -1u = 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 + -1u = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -1u = 0 + 9
-1u = 0 + 9

Combine like terms: 0 + 9 = 9
-1u = 9

Divide each side by '-1'.
u = -9

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

Simplifying
3 + -2u = 0

Solving
3 + -2u = 0

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

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

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

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

Divide each side by '-2'.
u = 1.5

Simplifying
u = 1.5
Solution
u = {-9, 1.5}