(5-u)(3u+4)=0

Solution for (5-u)(3u+4)=0 equation:

Simplifying
(5 + -1u)(3u + 4) = 0

Reorder the terms:
(5 + -1u)(4 + 3u) = 0

Multiply (5 + -1u) * (4 + 3u)
(5(4 + 3u) + -1u * (4 + 3u)) = 0
((4 * 5 + 3u * 5) + -1u * (4 + 3u)) = 0
((20 + 15u) + -1u * (4 + 3u)) = 0
(20 + 15u + (4 * -1u + 3u * -1u)) = 0
(20 + 15u + (-4u + -3u2)) = 0

Combine like terms: 15u + -4u = 11u
(20 + 11u + -3u2) = 0

Solving
20 + 11u + -3u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(5 + -1u)(4 + 3u) = 0

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

Simplifying
5 + -1u = 0

Solving
5 + -1u = 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 + -1u = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1u = 0 + -5
-1u = 0 + -5

Combine like terms: 0 + -5 = -5
-1u = -5

Divide each side by '-1'.
u = 5

Simplifying
u = 5
Subproblem 2
Set the factor '(4 + 3u)' equal to zero and attempt to solve:

Simplifying
4 + 3u = 0

Solving
4 + 3u = 0

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

Add '-4' to each side of the equation.
4 + -4 + 3u = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 3u = 0 + -4
3u = 0 + -4

Combine like terms: 0 + -4 = -4
3u = -4

Divide each side by '3'.
u = -1.333333333

Simplifying
u = -1.333333333
Solution
u = {5, -1.333333333}