4u^2=20u

Solution for 4u^2=20u equation:

Simplifying
4u2 = 20u

Solving
4u2 = 20u

Solving for variable 'u'.

Reorder the terms:
-20u + 4u2 = 20u + -20u

Combine like terms: 20u + -20u = 0
-20u + 4u2 = 0

Factor out the Greatest Common Factor (GCF), '4u'.
4u(-5 + u) = 0

Ignore the factor 4.
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 '(-5 + u)' equal to zero and attempt to solve:

Simplifying
-5 + u = 0

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

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

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

Simplifying
u = 5
Solution
u = {0, 5}