Equation point from a matrix

[Lord Dark]

Homework Statement

Good evening everyone,, I have the following problem:

The Attempt at a Solution

disregarding the digit ,, he's giving me P(x) and want P(A) but A is a matrix ,, should I get the determinant of A then apply it in the equation ?? or it has some idea I need to know ??

 

[Office_Shredder]

You know how to multiply matrices

You know how to add matrices

I dare say maybe you can just plug in A directly and get an answer. This is pretty common, giving a polynomial where you think the input is supposed to be a number, but then you plug in matrices instead to see what you get

 

[Mark44]

And since P(A) involves matrices, not numbers, be sure to use I in place of 1 in your formula for P(A).

 

[Lord Dark]

aha, got it ... Really it's very easy ,, I feel stupid :shy:

Thanks very much guys