Math 1090
Quiz 15
17 February, 2012
Name:
Instructions: Answer the questions below. Make sure to show all work
clearly.
This quiz has two sides
Let


1 −6
2 −1 −4
A=
and B = −4 −3
6 5
3
2
1
1. (4 points) Compute, or explain why it is impossible to do so:
(a) A · B
(b) A · B T
2. (6 points) Solve for the matrix A:
(a)
2 −1
1 0
·A=
5 −3
0 1
(b)
4 3
4 3
·A=
−2 1
−2 1