T that should be parameter, function or what? : Well, I'm new here and I don't really know how to precise where is the problem. Simply I have to prepere a code that will proceed like that:

x1 = x0 + t* e which in practice looks like that:

x1 = [0.5, 1] + [0, t]

x1 = [0.5, 1+t]

Here is my question: How should I declare 't' to make it work? I mean 't' has to remain here all the time, to make it possible to calculete roots of a quadratic function few steps further.

Thanks in advanced for help.