Question

(9-7i)^2

Answer 1

What do you want to do with this?

Answer 2

multiply

Answer 3

(9-7i)(9-7i)

Answer 4

i know that its 81- _ -49i i am missing a number when foiling

Answer 5

Do you know "FOIL"?

Answer 6

yes

Answer 7

First 9 x 9
Outside 9 x 7i
Inside 7i x 9
Last 7i x 7i
Then add'em all up.

Answer 8

i got 81-63i+63i+49

Answer 9

Oops! forgot the minus signs sorry.

First 9 x 9
Outside 9 x -7i
Inside -7i x 9
Last -7i x -7i
Then add'em all up.

Answer 10

ohhh yes i got it!

Answer 11

thank you

Answer 12

81 -63i - 63i + 49i

I think you one of us messed up the signs

Answer 13

Good. Your welcome. I screw up signs if I am not really anal about doing all the steps.