r^4-2r^2-8r=0

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Solution for r^4-2r^2-8r=0 equation: 


Simplifying
r4 + -2r2 + -8r = 0

Reorder the terms:
-8r + -2r2 + r4 = 0

Solving
-8r + -2r2 + r4 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), 'r'.
r(-8 + -2r + r3) = 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 '(-8 + -2r + r3)' equal to zero and attempt to solve:

Simplifying
-8 + -2r + r3 = 0

Solving
-8 + -2r + r3 = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
r = {0}

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