9r^2=24+30r

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Solution for 9r^2=24+30r equation:


Simplifying
9r2 = 24 + 30r

Solving
9r2 = 24 + 30r

Solving for variable 'r'.

Reorder the terms:
-24 + -30r + 9r2 = 24 + 30r + -24 + -30r

Reorder the terms:
-24 + -30r + 9r2 = 24 + -24 + 30r + -30r

Combine like terms: 24 + -24 = 0
-24 + -30r + 9r2 = 0 + 30r + -30r
-24 + -30r + 9r2 = 30r + -30r

Combine like terms: 30r + -30r = 0
-24 + -30r + 9r2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-8 + -10r + 3r2) = 0

Factor a trinomial.
3((-2 + -3r)(4 + -1r)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -3r)' equal to zero and attempt to solve: Simplifying -2 + -3r = 0 Solving -2 + -3r = 0 Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3r = 0 + 2 -3r = 0 + 2 Combine like terms: 0 + 2 = 2 -3r = 2 Divide each side by '-3'. r = -0.6666666667 Simplifying r = -0.6666666667

Subproblem 2

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

Solution

r = {-0.6666666667, 4}

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