u^2-28u=0

Solution for u^2-28u=0 equation:

Simplifying
u2 + -28u = 0

Reorder the terms:
-28u + u2 = 0

Solving
-28u + u2 = 0

Solving for variable 'u'.

Factor out the Greatest Common Factor (GCF), 'u'.
u(-28 + u) = 0

Subproblem 1
Set the factor 'u' equal to zero and attempt to solve:

Simplifying
u = 0

Solving
u = 0

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

Simplifying
u = 0
Subproblem 2
Set the factor '(-28 + u)' equal to zero and attempt to solve:

Simplifying
-28 + u = 0

Solving
-28 + u = 0

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

Add '28' to each side of the equation.
-28 + 28 + u = 0 + 28

Combine like terms: -28 + 28 = 0
0 + u = 0 + 28
u = 0 + 28

Combine like terms: 0 + 28 = 28
u = 28

Simplifying
u = 28
Solution
u = {0, 28}