SOLUTION: Hi all, I have a Matrix problem that I am not quite sure of how to solve. For the given matrix A: (1 2 3) (2 1 -1) (2 0 1) a) Write the matix 4a. (Does this just mean I solve

Question 206225: Hi all, I have a Matrix problem that I am not quite sure of how to solve.
For the given matrix A:
(1 2 3)
(2 1 -1)
(2 0 1)
a) Write the matix 4a. (Does this just mean I solve it by multiplying each number by 4?) and
b) Use matrix multiplication to find A^2 = AA.
Any help would be most appreciated.
Thanks, -Nick.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
For the given matrix A:
(1 2 3)
(2 1 -1)
(2 0 1)
a) Write the matix 4a. (Does this just mean I solve it by multiplying each number by 4?)
That's it. 4 times each element.
----------------
and
b) Use matrix multiplication to find A^2 = AA.
|11 4 4|
|+2 5 4|
|+4 4 7|
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