Hi. I have a couple questions about matrices that I am unable to solve.

if:

A= [2 -1 6] and B+ [1 -2 3]

-5 8 -10 6 10 -3

-9 2 1

find, if possible:

A) A squared B) B squared.

the answers are:

A) not possible

B) [-38 -16 12]

93 82 -15

-6 40 -32

but I have no clue how to get that.

Thanks for your help/time in advance.

Jenn