Question

i wanna ask what these symbols mean..

Answer 1

^ x, y E IIR means?

Answer 2

apply the role for n=2,3 , it well be easy for you to understand it
for n=2
\[x^2-y^2=(x-y)(x+y)\]

Answer 3

x means the first term
y means the second term
E means elements
||R means real numbers

Answer 4

As in @ikram002p sample
our x there is \[x^2\]
out y there is \[y^2\]
and since their powers are of two. hence they are element of real numbers. :) Hope you get it now.

Answer 5

\(\large x, y \in \mathbb{R} \)

means

x, y are Real numbers

Answer 6

i see, okay i understand thanks! :D