Question

I AM SO CONFUSED WHAT IS THIS!!!!

Answer 1

what's the question?

Answer 2

Are you talking about the website or do you have a question?

Answer 3

define \(\large i^2 = -1\) and multiply as usual

Answer 4

for example :
\[\large -2i\bullet(-2i) = 4i^2 = 4(-1) = -4 \]

Answer 5

@adjax culd you explain to me how and why you got that answer for 2

Answer 6

can u do the remaining ?

Answer 7

0.4i - i

i(0.4 - 1)

i(-0.6)

-0.6i

Answer 8

well D

Answer 9

you can treat "i" as a symbol/variable and add/subtract/multiply like you do with a normal variable

Answer 10

so -0.6i @ganeshie8 is right

Answer 11

0.4i - i=0.6i

Answer 12

0.4i - i= -0.6i

Answer 13

so this is for #2 right

Answer 14

so are thoe correct @ganeshie8