Question

if A=[ (2 3) (5 -2)] show that A^-1=1/19 A​

Answer 1

Answer:

A=|2 3|

|5 - 2|

A^-1=1(-4-15) |-2 - 3|

|-5 2|

= 1/19|2 3|=. 1/19 A

|5. - 2|