Try geometrically cos z1-z2 represents a the vector between the two. I think its gonna be a parallelogram or smth and thus (z1-z2) and (z1+z2) will be diagonals. Cos they’re equal in magnitude it has to be a rectangle i think.
go shore
Typically I would chunk my studying into half an hour then a break for 5 minutes, to restore focus and concentration. The only times I didn't do this were during full mock exams. I'd study a bit more on weekends and holidays but not that much during weekdays cos there wasn't much time.
In the IB the highest mark is 45/45 but there are much more 45s than .95s. I think IB is getting nerfed for med admissions soon cos USYd just doesn't have enough spaces.
Typically if u want to do med in uni I think physics is the most helpful but u have chem and bio already. I would just personally choose the subject that you’re the most confident in as the scaling of them are roughly equal.
edit: oops i didnt see the OP was from 6 months ago
Ye prob unlikely then. Usyd dental has a 99.6 cutoff and typically they tend to fill all undergraduate spots cos they have IB and international students too.