YEEEEEET

ye that way seems more efficient, thank you

thanks

OHHHH ok my intuition was so wrong lol

thanks very much

thank you very much!

thanks!

ah ok i realised where ive gone wrong thanks a lot 

thanks very much

(1+2i)(1+2i)

expand it you have

1+2i+2i+4i^2 

i^2 is equal to -1

so 1+2i+2i+4(-1)

which gives u

1-4+4i

which is 

A: -3+4i

ok i will do some researches about that,

thanks for the detailed explanation

Ahh, because the dot product of perpendicular vectors are 0 

i think the part i missed was to rewrite the coordinate of c

Thank you very much!