Posted by **Miley** on Friday, March 7, 2008 at 5:48pm.

why is the answer to this question no real root?

(-81)^3/4

- alg. 2 -
**drwls**, Friday, March 7, 2008 at 6:02pm
Because -81^3 is a negative number. If you take a 1/4 root of any negative number (which is the same thing as taking a square root twice), you get imaginary or complex (real + imaginary) numbers.

- alg. 2 -
**Damon**, Friday, March 7, 2008 at 6:02pm
the third power of -81 is a negative number

you can not take a square root of a negative number and get a real number.

(1/4) power is square root of square root.

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