Question

pls tell me answer in the picture question in photo​

Answer 1

a={1 -2 5}

{-1 4 1}

{3 1 0}

B=

{2

-1

4}

A-1= 1 -2 5

-1 4 1

3 1 0}

A-1.B= 4+9

-6+4

6-1

A-1,B={13

-2

5}