Question

Let A = [1,-3,2] and B =[-1,3,-2] . Find A-3B.
A.[4,-12,8]
B.[-4,12,-8]
C.[-2,6,-4]
D.[4,-6,4]

Answer 1

I think its C.

Answer 2

@agent0smith

Answer 3

the -3 is throwing me off!

Answer 4

First find 3B, by multiplying all the numbers inside B by 3.

Answer 5

[-3,9,-6]?

Answer 6

Now find
[1,-3,2] - [-3,9,-6]

Answer 7

-2,-12,-8?

Answer 8

-4,12,-8? so B?

Answer 9

thank you @agent0smith

Answer 10

Thats wrong

Answer 11

You didn't distribute the negative correctly.