Question

Memory refresher..

Answer 1

Subtract

7-(-5+6i)-(-1-i)

Answer 2

be careful with the signs
remember that - * + = - and -*- = + when you are distributing the negative over the 2 parentheses

Answer 3

Im assuming that your talking about the minus sign between the two parenthesis. The part that has me a bit stuck is the 7-. I know how to distribute the negative sign to others.

Answer 4

Ok, you got that \(i=\sqrt{-1}\) , right?

Answer 5

or, is it just variable/

Answer 6

Yes. This is complex numbers.

Answer 7

the first negative is distributed about the first parentheses in the usual way

Answer 8

The one behind the 7?

Answer 9

I read that:P

Answer 10

keep real part together and terms with " i " together this is all what you need to remember :)

Answer 11

the one after the 7 Yes

Answer 12

i wrote art @SolomonZelman :P

Answer 13

despite that it's my 3rd language, I got good at it lately:)

Answer 14

in any case,

Answer 15

7(5-6i)-(-1-i)

Now I times 7 to the first parenthesis and distribute the negative to the second correct?

Answer 16

if you like you can treat the - before the parentheses as -1
- so multiply everything in parentheses by -1

Answer 17

36-41i

Answer 18

7 - (-5 + 6i) = 7 + 5 - 6i

Answer 19

distributing the negative over - 5 + 6i gives + 5 - 6i

Answer 20

- you are not multiplying the -5 + 6i
bt multiplying it by -1

Answer 21

* not multiplying the -5 + 6i by 7 I meant to say

Answer 22

Why not? I just get rid of the parenthesis by distributing the negative?

Answer 23

I got 13-5i

Answer 24

yes and the 7 isn't touched - it stays put

Answer 25

7 + 5 - 6i - (-1 - i)
= 12 - 6t + 1 + i
= 13 - 5i

Answer 26

right

Answer 27

okay.

Answer 28

good

Answer 29

actually, doesn't matter whether i is a variable or imaginary number, you get the same result.

Answer 30

well, not the same value, but a result that is recorded in the same way.