-9u^2=36u

Solution for -9u^2=36u equation:

Simplifying
-9u2 = 36u

Solving
-9u2 = 36u

Solving for variable 'u'.

Reorder the terms:
-36u + -9u2 = 36u + -36u

Combine like terms: 36u + -36u = 0
-36u + -9u2 = 0

Factor out the Greatest Common Factor (GCF), '-9u'.
-9u(4 + u) = 0

Ignore the factor -9.
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 '(4 + u)' equal to zero and attempt to solve:

Simplifying
4 + u = 0

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

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

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

Simplifying
u = -4
Solution
u = {0, -4}