A B C DSolutionA 1 3 2 B 1 3 2 Then 3B 3 9 6 A 3B 13 3

A.

B.

C.

D.

Solution

A =

1

-3

2

B =

-1

3

-2

Then 3B =

-3

9

-6

A – 3B =

1+3

-3 - 9

    2 + 6

=

4

-12

8

Option A) is correct.