Question

simplify [4 5] [1 8]
[0 -1]+2[-4 -6]

Answer 1

Multiply all elements in the right matrix by 2. Then add the matrix element wise. So the element in the upper left corner is going to 4+2*1=6.

Can you find the other elements?

Answer 2

thats what i got 2 16
-8 -12

Answer 3

right, now you need to add that to \[\left[\begin{matrix}4 & 5 \\ 0 & 1\end{matrix}\right]\]

Answer 4

add those by 2?

Answer 5

you've multiplied the rigth matrix by 2, now you need to add the left matrix with matrix you just found, so:

\[\left[\begin{matrix}4 & 5 \\ 0 & 1\end{matrix}\right]+\left[\begin{matrix}2 &16 \\ -8 &-12\end{matrix}\right]\]

Answer 6

6 21
-8 -13 ?

Answer 7

that's right. I see that I put 1 instead -1 in my matrices. Sorry about that.