Question

Matrix Multiplication

Answer 1

@KendrickLamar2014

Answer 2

Can you try to solve it or do you need me to show you?

Answer 3

give me a sec to look at it

Answer 4

Ok

Answer 5

Ok so would I multiply each number in the first matrix by 2?

Answer 6

all the numbers in the matrix are the variable x. So you would do: 2 x(# in the matrix) + 2

Answer 7

ohhhhhh! ok give me a sec

Answer 8

:)

Answer 9

so after multiplying each number by 2, would I add 2 to each of them?

Answer 10

how does the + 2 fit in?

Answer 11

Let me do the 1st one:
The 1st number in the Matrix is 2.

So you would do:
2*2+2
4+2
6

Answer 12

sorry, like this?

6 -14
-6 6

Answer 13

Yes

Answer 14

ok but there's an = sign between them...

Answer 15

so what answer am I looking for?

Answer 16

How about writing the matrices as just A and B, and solving for x as in algebra.

Answer 17

^

Answer 18

whoa ok I'm lost already

Answer 19

\[2X+2A = B\]

Answer 20

ohh i was doing it wrong :( sorry

Answer 21

its fine @KendrickLamar2014 you were trying :)

Answer 22

Then we can solve for x from here, like so...\[X = \frac{ 1 }{ 2 }\left( B-2A \right)\]

Answer 23

ok... let me try to work it out...

Answer 24

We know A and B. So, do necessary substitution.

Answer 25

so the answer is B??

Answer 26

0 -11
-3 -6

Answer 27

I didn't solve it actually.

Answer 28

oh haha well I think that's the right answer. thank you

Answer 29

Welcome!