Question

Product of (1+i)(1-2i)

Answer 1

can you FOIL binomials?

Answer 2

yes thats all i do?

Answer 3

yes... that's it. then simplify.

Answer 4

oh ok thank you

Answer 5

yw

Answer 6

ok that didnt work

Answer 7

what did you get?

Answer 8

remember that \(i^2 = -1\)

Answer 9

2i^2-i+1

Answer 10

ahh

Answer 11

right...

Answer 12

and it should be \(-2i^2 - i + 1\) coz \(-2i \times i = 2i^2\) sorry dp :p

Answer 13

hahaha

Answer 14

that's \(-2i \times i = -2i^2\)

Answer 15

is the answer 1+4i?

Answer 16

i really have no idea lol

Answer 17

how did you get that? it's \(-2i^2 - i + 1\) like i said \(i^2 = -1\) so \((-2)(-1) - i +1 \)

Answer 18

oh. lol i see

Answer 19

i was just guessing

Answer 20

i do that often trust me