Question

How in the world is this operation performed?

3 [ 1 1 -3 ] 4 [ -2 -1 8 ]
[ 3 2 3 ] [ 4 2 2 ]
[ 7 -1 6 ] [ 3 6 3 ]

Answer 1

what is the operation?

Answer 2

The lesson is about systems of linear equations and matrices...

Answer 3

ok ... and what do these 2 matrixes represent to us?

Answer 4

It says in this operation...Perform the indicated operation...

Answer 5

scalar multiplication?

Answer 6

are you scaling each matrix by the number onthe outside of it? if so, multiply it all by well, 3 in the first case

Answer 7

Yes, scalar multiplication

Answer 8

multiply numbers in matrix by number on outside

Answer 9

its the same step as if you did this: 3(4); but you have to do it to all the elements

Answer 10

exactly

Answer 11

Okay, so I'm multiplying the 3 by everything in its matrix and the 4 in the one following that??

Answer 12

yes

Answer 13

\[\left[ \begin{array}c 3(1) & 3(1) & 3(-3)\\3(3) & 3(2) & 3(3)\\3(7) & 3(-1) & 3(6)\\\end{array} \right]\]

Answer 14

well, unless youre supposed to combine the martixes; that shuold be it

Answer 15

there really isnt a specified operation

Answer 16

3 3 -9
9 6 9
21 -3 18

Answer 17

Does that look right for the first matrix?

Answer 18

yep

Answer 19

yeah but is that one problem or two?

Answer 20

Okay, so then you would have 2 matrices next to each other such as the one I just showed and the 3 and 4 on the outside disappear?

Answer 21

if thats one problem you might have to multiply matrices
im not sure of the notation for that tho

Answer 22

After I multiply the 2 sets. How do I combine them though?

Answer 23

i dont think you have to multiply but in case you do:
http://www.mathsisfun.com/algebra/matrix-multiplying.html