SOLUTION: 2r-³ =-16

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Question 1174244: 2r-³ =-16
Answer by ikleyn(53763) About Me  (Show Source):
You can put this solution on YOUR website!
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You start with


    2r%5E3 = -16


Divide both sides by 2


    r%5E3 = -16/2 = -8


Take cube root from both sides


    r = root%283%2C-8%29 = -2.


ANSWER.   The solution is r= -2.   It is a unique solution to this equation over real domain.

Solved.