Cannot slove error in Octave

[awefjioawefjio]

Hi all, I have a problem while trying to do numerical solution with Octave. I
got the following error while trying to run the script.
<http://octave.1599824.n4.nabble.com/file/t373045/Picture1.png> 



When I tried to remove the ";" I will get the following error.
<http://octave.1599824.n4.nabble.com/file/t373045/Picture2.png> 

I also noticed that there is nothing in the workspace. The weird part is
that the code works just fine on my friend's Octave. I just copy and paste
the code into my computer, but it does not run the script. Can anyone please
help?




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