Question

Multiply (6 – 7i)(3 – 6i)

Answer 1

FOIL them out!

Answer 2

@Chlorophyll He speaks the truth!

Answer 3

ok, 18 + 36i - 21i + 42i

Answer 4

now what?

Answer 5

-24-57i

Answer 6

Simplify them, will you!

Answer 7

You foiled wrong!!

Answer 8

-7i *– 6i= -7*-6*i*i= -42

The nagative cancels out and you got the 42 right but if you mutltiply two i you get -1

Answer 9

18 - 42 i^2 - 36i - 21 i

Answer 10

Can you simplify them now?

Answer 11

Keep in mind i^2 = -1 :)

Answer 12

-42i^2= 42

Answer 13

No @Chlorophyll 18 - 42 i^2 - 36i - 21 i
thahts wrong

It should be

18 + 42 i^2 - 36i - 21 i

Answer 14

I mean - 24 - 57i

Answer 15

If you simplify them, that the end result -24 - 57i :)

Answer 16

@romeo, thank for reminding, my mind just calculate i^2 too early :/