Question

if u= (1+i square root of 3) and v= (1-i square root of 3). What is uv?

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

Answer 1

hey

Answer 2

expand the brackets out

Answer 3

you get \[(1)^2+i\sqrt3-i\sqrt3-(i\sqrt3)^2 \]
\[(1)^2-i^2(\sqrt3)^2 = 1+3=4 \]