create intersection points between lists of functions

Question

I am trying to find the intersection points between two lists of funtions in geogebra.

Let's say I have the folowing two lists of functions:

offset = {1,2}
l1 = x + offset
l2 = -x - offset

Now I want to create a list of intersection points of l1 and l2. Just using intersect(l1,l2) doesn't work. I tried declaring it as a list with brackets {}, but that doesn't succeed either.

Then I tried defining a seperate index list index = {1,2} and using this to clarify which element of the list I want to access intersect(l1(index),l2(index)), buuut an undefined just kept showing up.

I am grateful for any suggestions.