Question

(2 + 3i)2
Simplify the expression.
A) -5
B) -5 + 12i
C) 4 + 9i
D) 5 - 12i

Answer 1

is it \[(2-3i)^2\]

Answer 2

Yes it is

Answer 3

2*2+3*3i :)

Answer 4

thanks

Answer 5

Wait but that isn't right though.

Answer 6

You multiply i know
it becomes 4 + 9i

Answer 7

Nonono. That is not correct..

Answer 8

How? I dont get it

Answer 9

techincally none of the answers are correct though bc it should be \[i^2\] right @xMissAlyCatx

Answer 10

its A

Answer 11

(2-3i)^2 = (2-3i)(2-3i) = 4 - 12i + 9i^2

i is the square root of -1, so i^2 = -1

So, 4 - 12i + 9i^2 = 4 - 12i - 9 = -5 - 12i

Answer 12

the answer is A because 9i becomes 9(-1) and that becomes 4+-9 which equals -5

Answer 13

So you wouldn't be just simply multiplying, it is like a matter of using the FOIL method first.

Answer 14

The answer is not A.

Answer 15

yeah #forgotboutthat

Answer 16

ah

Answer 17

Do you understand now?

Answer 18

the answer is A

Answer 19

Kind of,

Answer 20

@Poohdessey No, it is not. And don't give direct answers even if they are wrong. It is against code of conduct.

Answer 21

@xMissAlyCatx whose code of conduct i did explain it. Everyone deserves an explanation, so in the future when he has a problem like it he can do it on his own .... no shade

Answer 22

The websites code of conduct, want me to link it to you? You didn't explain all you did was give answer.

Answer 23

i most definitely did explain it

Answer 24

But it was incorrect..

Answer 25

and you would know because.... right i know im correct lml.... I dont need you to try to tell me what's right or wrong because I'm not the one with the question. sorry, but I am more than capable of working out this math problem on my own.

Answer 26

It wasn't your math question/post first of all, and I know how to solve it, and I did.. correctly.

Answer 27

You didn't use the correct method to solve.