College Algebra
Matrices
Matrix Addition
Interactive Example 1
Definition
.
If
A = (a
ij
)
m x n
and
B = (b
ij
)
m x n
are both
m x n
matrices, then
A
+
B
=
(a
ij
+ b
ij
)
m x n
A
-
B
=
(a
ij
- b
ij
)
m x n
a
11
a
12
a
21
a
22
b
11
b
12
b
21
b
22
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