Question

Just a quick question
(-9+i)-(4-i)
Does it equal 13 or is it 13+i ?

Answer 1

well -9-4=?
and i-(-i)=?

Answer 2

i is an imaginary number

Answer 3

I assumed so

Answer 4

\[(-9+i) -(4-i) \\ (-9-4)+(i-(-i))\]
you still need to simplify real part and imaginary part

Answer 5

So it's -13+i ?

Answer 6

not quite

Answer 7

i-(-i) is i+i

Answer 8

which is 2i

Answer 9

Oh 2i

Answer 10

yes so -13+2i

Answer 11

Thank you!

Answer 12

all i did was take the terms in the first parenthesis and put a minus sign the wrote the terms in the second parenthesis