5r^2+100=45r

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Solution for 5r^2+100=45r equation:


Simplifying
5r2 + 100 = 45r

Reorder the terms:
100 + 5r2 = 45r

Solving
100 + 5r2 = 45r

Solving for variable 'r'.

Reorder the terms:
100 + -45r + 5r2 = 45r + -45r

Combine like terms: 45r + -45r = 0
100 + -45r + 5r2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(20 + -9r + r2) = 0

Factor a trinomial.
5((4 + -1r)(5 + -1r)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(4 + -1r)' equal to zero and attempt to solve: Simplifying 4 + -1r = 0 Solving 4 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1r = 0 + -4 -1r = 0 + -4 Combine like terms: 0 + -4 = -4 -1r = -4 Divide each side by '-1'. r = 4 Simplifying r = 4

Subproblem 2

Set the factor '(5 + -1r)' equal to zero and attempt to solve: Simplifying 5 + -1r = 0 Solving 5 + -1r = 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 + -1r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1r = 0 + -5 -1r = 0 + -5 Combine like terms: 0 + -5 = -5 -1r = -5 Divide each side by '-1'. r = 5 Simplifying r = 5

Solution

r = {4, 5}

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