Question

Which is equivalent to (3 + 2i)(3 - 2i)?

Answer 1

(3+2i)(3-2i) = 6+4i^2 = 6 - 4 = 2 (as i^2 = -1)

Answer 2

You almost had it tommo_lcfc.

Niquita15, note that (3+2i)(3-2i) is the difference of squares.

So you would have \[9-4i ^{2}\] Which becomes 9-[(4)(-1)] = 13

Answer 3

What was I thinking? Silly mistakes!
First 3*3 is not 6!
Second, multiplying different signs together makes the answer negative!
I am annoyed!

Answer 4

VERY ANNOYED!!!
I'm still smiling though :)

Answer 5

-4 times -1 is a positive 4

Answer 6

Yes but they are the same sign.
-- and ++ = +
+- and -+ = -

Answer 7

Look at what I wrote down, and think about it.