Question

Multiply: (8-3i)(5-4i)

Answer 1

http://www.twiddla.com/solved

Answer 2

38-47i

Answer 3

28-47i

Answer 4

soory..28-47i

Answer 5

lol

Answer 6

Foid
40-32i-15i+12i^2
i^2=-1
40-47i+(12*-1)=40-47i -12
= 28 -47i

Answer 7

You can "foil" or you can use traditional top down multiplication methods, which are much easier in my opinion, lol

Answer 8

only foid

Answer 9

What is foid....lol

Answer 10

time

Answer 11

I thought it was foil, lol

Answer 12

(8*5)-(8*-4i)-(3i*5)+(-3i*-4i)

Answer 13

That's FOIL....first, outer, inner, last...but, there's always more than one way of course....

Answer 14

FOIL is popular, but it isn't the traditional form of multiplication method....It's more like a "way to remember how to multiply in case you forget" method, lol