Given the matrices... Find A times B

Question

A=[-1 0]

    [0 -2]

B=[1 -2]

    [3 -1]

(the brackets in each A and B are actually suppose to be connected)

1st row=? 2nd row=?

 

Answer 1

0 0
Given the matrices... Find A times B
A=[-1 0]
[0 -2]
B=[1 -2]
[3 -1]
(the brackets in each A and B are actually suppose to be connected)
1st row=[-1, 2]

2nd row=[-6, 2]

 

c11=-1(1)+0(3)=-1

c12=-1(-2)+0(-1)=2

c21=0(1)+(-2)(3)=-6

c22=0(-2)+(-2)(-1)=2