0=-r^2+5r

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Solution for 0=-r^2+5r equation:


Simplifying
0 = -1r2 + 5r

Reorder the terms:
0 = 5r + -1r2

Solving
0 = 5r + -1r2

Solving for variable 'r'.
Remove the zero:
-5r + r2 = 5r + -1r2 + -5r + r2

Reorder the terms:
-5r + r2 = 5r + -5r + -1r2 + r2

Combine like terms: 5r + -5r = 0
-5r + r2 = 0 + -1r2 + r2
-5r + r2 = -1r2 + r2

Combine like terms: -1r2 + r2 = 0
-5r + r2 = 0

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

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}

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