Question

If u = (1 + i ) and v = (1 − i ), what is uv?

A) 1
B) -4
C) -4i
D) 4

Answer 1

Not sure if your choices are correct, or perhaps there is a typo in the question or answers.

Answer 2

\((1+i)(1-i)=1^2-i^2=1-(-1)=2\)

Answer 3

u = (1+i ), v=(1−i )

uv=(1+i)(1-i)

uv=(1-i+i-i^2)

uv=(1-i^2)

i^2=-1

uv=(1-(-1))

uv=2