Answer:
Not possible.
Step-by-step explanation:
Addition of Matrix A and Matrix B is possible only if the order of matrix A is same as the order of matrix B.
Order of a matrix with [tex]m[/tex] rows and [tex]n[/tex] columns is [tex]m\times n[/tex].
Here, matrix A is [tex]\left[\begin{array}{ccc}2&-4\\-4&10\\0&-8\end{array}\right][/tex]
Matrix B is [tex]\left[\begin{array}{ccc}0&-4&6\\2&-10&4\end{array}\right][/tex].
Multiplying a matrix by a constant doesn't change its order.
So, order of matrix A is [tex]3\times 2[/tex] as it has 3 rows and 2 columns.
The order of matrix 3B is [tex]2\times 3[/tex] as it has 2 rows and 3 columns.
Therefore, addition is not possible as the order is different.
