SOLUTION: Solve 2r-³=- 16

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Question 1174242: Solve 2r-³=- 16
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(53765)   (Show Source): You can put this solution on YOUR website!
.

You start with


     = -16


Divide both sides by 2


     = -16/2 = -8


Take cube root from both sides


    r =  = -2.


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

Solved.



Answer by MathTherapy(10810)   (Show Source): You can put this solution on YOUR website!
Solve 2r-³=- 16 
Answer depends on whether this is: 

If FORMER, then it's , but if the LATTER, it's - 2. 

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