Question

I F A=(1 2 2) find f(A) where f(x)
(2 1 2 ) =x²-4x-5
(2 2 1)

​

Answer 1

Answer:

f

(

A

)

=

[

−

1

2

3

1

]

⋅

[

−

1

2

3

1

]

−

2

[

−

1

2

3

1

]

+

3

I

Where

I

is the identity matrix:

[

1

0

0

1

]

And then process the algebra.

If you need an answer check, I get:

f

(

A

)

=

2

[

6

−

2

−

3

4

]