8r^3=72r

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Solution for 8r^3=72r equation:


Simplifying
8r3 = 72r

Solving
8r3 = 72r

Solving for variable 'r'.

Reorder the terms:
-72r + 8r3 = 72r + -72r

Combine like terms: 72r + -72r = 0
-72r + 8r3 = 0

Factor out the Greatest Common Factor (GCF), '8r'.
8r(-9 + r2) = 0

Factor a difference between two squares.
8r((3 + r)(-3 + r)) = 0

Ignore the factor 8.

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

Subproblem 3

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

Solution

r = {0, -3, 3}

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