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Why matlab only fives one complex result?

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Hello everyone, I have been struggling for so much time...I have been doing a complex equation (I am actually able to solve it manually but I just want to ger more familiar with Matlab). There are 3 complex solutons, however, matlab only gives me one of them. What can I do so that it gives me all 3 solutions?

Accepted Answer

Walter Roberson
Walter Roberson on 30 Oct 2019
Square both sides of the equation. MATLAB will provide 3 solutions.
It is advisable to cross check the solutions, as squaring both sides can introduce false roots.
  2 Comments
Graciano Ding
Graciano Ding on 30 Oct 2019
Just one question...how can (0-0.381571414184444i)^(-3/2) be -3+3*i? I calculated it manually and it should be one of the answers...what mistake did I make?complexo power.jpg

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More Answers (1)

Sai Bhargav Avula
Sai Bhargav Avula on 30 Oct 2019
Edited: Sai Bhargav Avula on 30 Oct 2019
Hi,
MATLAB cannot generate all the Solutions, which might require a global solver.
However, if you have the Extended Symbolic Math Toolbox (access to Maple), then you can do this in Maple.
maple('_EnvAllSolutions:= true;')
This can give a generic result for the equation provided
  2 Comments
Sai Bhargav Avula
Sai Bhargav Avula on 30 Oct 2019
It might require different intilizations to get all the solutions. So I suggested this.

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