Find Roots of Function & Return Column Vector

[noobienoob]

i need to create a function that returns the pure zeros on the left semiplane and 0 if there is one and only one zero in the origin of the referential. the return has to be in a column vector like [root1;root2;...;rootn;0] or [root1;root2;...;rootn] if there is no root in the origin of the referential. i can get a column full of zeros or an empty vector. i can post the code of what i made if necessary.

 

[noobienoob]

 

[noobienoob]

that is what i got so far. but I'm stuck here...