(6+u)(5u-8)=0

Solution for (6+u)(5u-8)=0 equation:

Simplifying
(6 + u)(5u + -8) = 0

Reorder the terms:
(6 + u)(-8 + 5u) = 0

Multiply (6 + u) * (-8 + 5u)
(6(-8 + 5u) + u(-8 + 5u)) = 0
((-8 * 6 + 5u * 6) + u(-8 + 5u)) = 0
((-48 + 30u) + u(-8 + 5u)) = 0
(-48 + 30u + (-8 * u + 5u * u)) = 0
(-48 + 30u + (-8u + 5u2)) = 0

Combine like terms: 30u + -8u = 22u
(-48 + 22u + 5u2) = 0

Solving
-48 + 22u + 5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-6 + -1u)(8 + -5u) = 0

Subproblem 1
Set the factor '(-6 + -1u)' equal to zero and attempt to solve:

Simplifying
-6 + -1u = 0

Solving
-6 + -1u = 0

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

Add '6' to each side of the equation.
-6 + 6 + -1u = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -1u = 0 + 6
-1u = 0 + 6

Combine like terms: 0 + 6 = 6
-1u = 6

Divide each side by '-1'.
u = -6

Simplifying
u = -6
Subproblem 2
Set the factor '(8 + -5u)' equal to zero and attempt to solve:

Simplifying
8 + -5u = 0

Solving
8 + -5u = 0

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

Add '-8' to each side of the equation.
8 + -8 + -5u = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -5u = 0 + -8
-5u = 0 + -8

Combine like terms: 0 + -8 = -8
-5u = -8

Divide each side by '-5'.
u = 1.6

Simplifying
u = 1.6
Solution
u = {-6, 1.6}