Question

The value of (i+1)(i-1) is
3
1) 2
2) 1
1)​

Answer 1

Answer:

hy

Step-by-step explanation:

so the eqn is

(i+1)(i-1) =3

by formula a^2-b^2

i^2-1^2=3

i^2-1=3

i^2=3+1

i^2=4

i=2

option 1] i=2