9r^2-45r=0

Solution for 9r^2-45r=0 equation:

Simplifying
9r2 + -45r = 0

Reorder the terms:
-45r + 9r2 = 0

Solving
-45r + 9r2 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), '9r'.
9r(-5 + r) = 0

Ignore the factor 9.
Subproblem 1
Set the factor 'r' equal to zero and attempt to solve:

Simplifying
r = 0

Solving
r = 0

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

Simplifying
r = 0
Subproblem 2
Set the factor '(-5 + r)' equal to zero and attempt to solve:

Simplifying
-5 + r = 0

Solving
-5 + r = 0

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

Add '5' to each side of the equation.
-5 + 5 + r = 0 + 5

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

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

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