r^3-5r-4r+20=0

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Solution for r^3-5r-4r+20=0 equation: 


Simplifying
r3 + -5r + -4r + 20 = 0

Reorder the terms:
20 + -5r + -4r + r3 = 0

Combine like terms: -5r + -4r = -9r
20 + -9r + r3 = 0

Solving
20 + -9r + r3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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