Question

find the modulus of oneplus I divided by 1 - I​

Answer 1

1+I/1-I × 1+I/1+I

=(1+I)^2/1^2-I^2

=1^2 + I^2/1^2-I^2

=1^2 will be cancelled

So we left with

I^2/ -I^2

= -1/1

HOPE U UNDERSTAND