SOLUTION: I need help with a few problems on multiplying matrices a = -1 1 2 -1 b= 4 -3 0 2 c= -2 -3 1 1 I need to do the problems as seen below

Algebra ->  Matrices-and-determiminant -> SOLUTION: I need help with a few problems on multiplying matrices a = -1 1 2 -1 b= 4 -3 0 2 c= -2 -3 1 1 I need to do the problems as seen below       Log On


   

Question 661398: I need help with a few problems on multiplying matrices
a = -1 1
2 -1

b= 4 -3
0 2
c= -2 -3
1 1
I need to do the problems as seen below
A * A
A(B + C)
2(CA)
AB + BC
A(B - C)
-2(BA)
My teacher was gone today and our sub knew nothing at all. We have a test Friday over this and i need some help. Thanks!!!
Found 2 solutions by ascherff, stanbon:
Answer by ascherff(1) About Me  (Show Source):
You can put this solution on YOUR website!
Nevermind! Figured it out!
i got 3 -1
-4 3 for the first one. check my answers and see if im right or wrong if you would!

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Please check out the following site.
It will show you how to multiply
a matrix by a matrix.
-----
http://www.youtube.com/watch?v=sYlOjyPyX3g
Cheers,
Stan H.