9u^2-28u+3=0

Solution for 9u^2-28u+3=0 equation:

Simplifying
9u2 + -28u + 3 = 0

Reorder the terms:
3 + -28u + 9u2 = 0

Solving
3 + -28u + 9u2 = 0

Solving for variable 'u'.

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

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

Simplifying
1 + -9u = 0

Solving
1 + -9u = 0

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

Add '-1' to each side of the equation.
1 + -1 + -9u = 0 + -1

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

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

Divide each side by '-9'.
u = 0.1111111111

Simplifying
u = 0.1111111111
Subproblem 2
Set the factor '(3 + -1u)' equal to zero and attempt to solve:

Simplifying
3 + -1u = 0

Solving
3 + -1u = 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 + -1u = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1u = 0 + -3
-1u = 0 + -3

Combine like terms: 0 + -3 = -3
-1u = -3

Divide each side by '-1'.
u = 3

Simplifying
u = 3
Solution
u = {0.1111111111, 3}