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

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.

Answer 1

[Gargi Patil]

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);