(4-u)(4u+6)=0

Solution for (4-u)(4u+6)=0 equation:

Simplifying
(4 + -1u)(4u + 6) = 0

Reorder the terms:
(4 + -1u)(6 + 4u) = 0

Multiply (4 + -1u) * (6 + 4u)
(4(6 + 4u) + -1u * (6 + 4u)) = 0
((6 * 4 + 4u * 4) + -1u * (6 + 4u)) = 0
((24 + 16u) + -1u * (6 + 4u)) = 0
(24 + 16u + (6 * -1u + 4u * -1u)) = 0
(24 + 16u + (-6u + -4u2)) = 0

Combine like terms: 16u + -6u = 10u
(24 + 10u + -4u2) = 0

Solving
24 + 10u + -4u2 = 0

Solving for variable 'u'.

Factor out the Greatest Common Factor (GCF), '2'.
2(12 + 5u + -2u2) = 0

Factor a trinomial.
2((4 + -1u)(3 + 2u)) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(4 + -1u)' equal to zero and attempt to solve:

Simplifying
4 + -1u = 0

Solving
4 + -1u = 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 + -1u = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1u = 0 + -4
-1u = 0 + -4

Combine like terms: 0 + -4 = -4
-1u = -4

Divide each side by '-1'.
u = 4

Simplifying
u = 4
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 = {4, -1.5}