Question

If A and B are square matrices of order 3 such that A=-1, B = 3, then 3AB=
a)-81
b) 81
c) 27
d) - 27​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

3ab

$3 \times { - 1}^{3} \times {3}^{3}$

=

${ - 1}^{3} = - 1 \\ 3 \times - 1 = - 3 \\ - 3 \times {3}^{3} \\ - 3 \times 27 \\ = - 81$

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