Question

If A =( 2 -4 -5 3 )find A+ A" and AA".​

Answer 1

Answer:

A=(2-4-53)

=(-2-53)

=(-55)

So, A+A

={-55+(-55)}

=(-55-55)

= (-110)

And AA= (-55)(-55)

=3025

Answer 2

Answer:

A+ A = - 110

AA = 3025

Step-by-step explanation:

A = ( 2 - 4 -5 3 ) ( Given )

To find : A + A

Putting values of A

= (2 - 4 -53) + (2 - 4 -53)

= 2 - 4 -53 + 2 - 4 - 53

= 2 + 2 - 4 - 4 - 53 - 53

= 4 - 8 - 106

= 4 - 114

= - 110

Therefore , A + A = - 110

We have to find : AA

Putting values of A

= ( 2 -4 -53) ( 2 -4 -53)

= 2 ( 2 -4 -53 ) -4 ( 2 -4 -53) -53 ( 2 -4 -53)

= 4 - 8 - 106 - 8 + 16 + 212 - 106 + 212 + 2809

= 4 - 8 - 8 + 16 - 106 - 106 + 212 + 212 + 2809

= 4 - 16 + 16 - 212 + 424 + 2809

= 4 + 212 + 2809

= 216 + 2809

= 3025

So , AA = 3025