Question

The points (-5, 2) and (2, -5) lie in the *(а) same quadrant
(b) II and III quadrant respectively.
(c) II and IV quadrant respectively.
(d) I and IV quadrant respectively.​

Answer 1

Correct option is

C

21+21i

Let z=x+iy be multiplication inverse of 1−i

then we must have 

(x+iy)(1−i)=1

x−ix+iy+y=1

x+y=1 and x−y=0

put x=y we have x=y

2y=1     y=21,x=21

Hence z=x+iy=21+2i

Answer 2

Answer:

(c) II and IV quadrant respectively

Hope it helps you!