(2u-9)(5-u)=0

Solution for (2u-9)(5-u)=0 equation:

Simplifying
(2u + -9)(5 + -1u) = 0

Reorder the terms:
(-9 + 2u)(5 + -1u) = 0

Multiply (-9 + 2u) * (5 + -1u)
(-9(5 + -1u) + 2u * (5 + -1u)) = 0
((5 * -9 + -1u * -9) + 2u * (5 + -1u)) = 0
((-45 + 9u) + 2u * (5 + -1u)) = 0
(-45 + 9u + (5 * 2u + -1u * 2u)) = 0
(-45 + 9u + (10u + -2u2)) = 0

Combine like terms: 9u + 10u = 19u
(-45 + 19u + -2u2) = 0

Solving
-45 + 19u + -2u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-5 + u)(9 + -2u) = 0

Subproblem 1
Set the factor '(-5 + u)' equal to zero and attempt to solve:

Simplifying
-5 + u = 0

Solving
-5 + u = 0

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

Add '5' to each side of the equation.
-5 + 5 + u = 0 + 5

Combine like terms: -5 + 5 = 0
0 + u = 0 + 5
u = 0 + 5

Combine like terms: 0 + 5 = 5
u = 5

Simplifying
u = 5
Subproblem 2
Set the factor '(9 + -2u)' equal to zero and attempt to solve:

Simplifying
9 + -2u = 0

Solving
9 + -2u = 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 + -2u = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -2u = 0 + -9
-2u = 0 + -9

Combine like terms: 0 + -9 = -9
-2u = -9

Divide each side by '-2'.
u = 4.5

Simplifying
u = 4.5
Solution
u = {5, 4.5}