Question

Simplify. (1 + i)(1 - i) A) -2 B) -1 C) 0 D) 2

Answer 1

Hi there!

Answer:

D. 2

*The answer must have a positive sign.*

Step-by-step explanation:

Distributive property: a(b+c)=ab+ac

a=1, b=1

$1^2+1^2$

Then, you add by the numbers from left to right.

1+1=2

Final answer is 2.

Hope this helps!

Have a nice day! :)

:D

-Charlie

Thanks!