Answer:
To find -2B - A, we need to first find the product of 2 and matrix B, and then subtract matrix A from the result.
We can start by finding the product of 2 and matrix B:
2B = 2 *
[
1
4
−6
10
−7
−2
] =
[
2
8
−12
20
−14
−4
]
Next, we can subtract matrix A from 2B:
-2B - A =
[
2
8
−12
20
−14
−4
] -
[
4
2
5
6
4
4
] =
[
-2
6
-17
14
-18
-8
]
Therefore,
−2
�
−
�
.
−2B−A
�
=
[
-2
6
-17
14
-18
-8
].
Explanation: