Question

if A=[4/-1 2/1] then find A² in matrix​

Answer 1

Answer:

A

2

=1 can be witten as

A

2

=I

multiply A

−1

on both side

A

−1

×(A×A)=A

−1

×I

(A

−1

×A)×A=A

−1

I×A=A

−1

A

−1

=A

Corrrect option is B