Question

I’m very confused abt this question: Look at the pic for clarification.

Answer 1

Answer:

8A

Step-by-step explanation:

We are multiplying the matrix by a scalar

Each term in the first matrix is multiplied by 2

$\left[\begin{array}{ccc}2l&2m&2n\\2p&2q&2r\\2s&2t&2u\end{array}\right]$

Factor out 2

$2\left[\begin{array}{ccc}l&m&n\\p&q&r\\s&t&u\end{array}\right]$

We know that the determinant of a matrix when multiplied by a scalar is found by

det ( a A) =a^n * det (A)

The scalar in this case is 2  and n is the number of rows ( or columns) since the matrix must be square

 det (2A) = 2^3 det(A)  = 8A

Answer 2

Answer:

(A)

Step-by-step explanation:

Factor the 2 out and do 2/1=x/A

X=2A