04.03.1
Chapter 04.03
Binary Matrix Operations
After reading this chapter, you should be able to
1.
add, subtract, and multiply matrices, and
2.
apply rules of binary operations on matrices.
How do you add two matrices?
Two matrices
]
[
A
and
]
[
B
can be added only if they are the same size. The addition is then
shown as
]
[
]
[
]
[
B
A
C
+
=
where
ij
ij
ij
b
a
c
+
=
Example 1
Add
the following two matrices.
=
7
2
1
3
2
5
]
[
A
−
=
19
5
3
2
7
6
]
[
B
Solution
]
[
]
[
]
[
B
A
C
+
=
−
+
=
19
5
3
2
7
6
7
2
1
3
2
5
+
+
+
−
+
+
=
19
7
5
2
3
1
2
3
7
2
6
5
=
26
7
4
1
9
11
Example 2
Blowout r’us store has two store locations
A
and
B
, and their sales of tires are given by
make (in rows) and quarters (in columns) as shown below.

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