Question

Fill in the missing number in the equation.

Drop down answers: -2, 8, 15, or It is not possible to find the answer

Answer 1

9514 1404 393

Answer:

8

Explanation:

The matrix being multiplied is the same in all cases, so we can "collect terms" in the usual way.

3A +5A = (3+5)A = 8A . . . . . . where A represents the 2×2 matrix

The missing number is 8.