Question

I'm not sure how to do this. Can anyone help me for a medal?
(will post link to question)

Answer 1

which one do you think it is?

Answer 2

Honestly, I haven't the slightest idea, but if I had to guess, maybe b.

Answer 3

What is a positive plus a negative

Answer 4

A negative.

Answer 5

Okay look at C

Answer 6

I'm sorry, but I'm not sure what I'm supposed to be looking at exactly.

Answer 7

on your attachment look at option C

Answer 8

Yes, I understand that part, but what about C particularly?

Answer 9

the i is negative and by itself because -2i+i is -i

Answer 10

Oh! I see now.
I'm a bit rusty on imaginary numbers.
Thank you! :)

Answer 11

ya no problem.. anytime, im awesome at math.. pre-calc