SOLUTION: This does not make sense to me. I am not getting the correct answer. I think I have the wrong formula. Find the indicated root or state that the expression is not a real number:

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: This does not make sense to me. I am not getting the correct answer. I think I have the wrong formula. Find the indicated root or state that the expression is not a real number:      Log On


   

Question 49986: This does not make sense to me. I am not getting the correct answer. I think I have the wrong formula.
Find the indicated root or state that the expression is not a real number:
a. 3√ 8
125
This is the cube root of 8/125.
b. -4√81
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
cube rt.(8/125)
=cbrt 8 / cbrt 125
=2/5
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b. -4√81
-(4th rt of 81)
=-3
Cheers,
Stan H.