How to display all valid results when converting fraction form to decimal form? Specifically when the fraction expression includes roots of negative numbers.

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Wayne
Wayne on 12 Apr 2021
Answered: Gargi Patil on 15 Apr 2021
For example, (-1)^(1/3)+2 is something what I got from subsituting varibles into a symbolic equation, and I would like to see all the complex results and eliminate ones that have imaginary components.

Answers (1)

Gargi Patil
Gargi Patil on 15 Apr 2021
To view all the roots of an expression, you can use the function roots().
The following code returns all the roots of (-1)^(1/3)+2:
allRoots = 2 + roots([1 0 0 1]);
To obtain only the nth real root, the function nthroot() can be used.
The following code returns the real root for the expression (-1)^(1/3)+2:
realRoots = 2 + nthroot(-1, 3);

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