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3) Press MATRX. Under the NAMES menu, select 2. [B] by pressing 2 or
highlighting 2 and hitting ENTER. You should have the following on your home
screen:
4) Now press ENTER to obtain the result.
To find A - B, repeat the above steps, but select the subtraction sign instead of the
addition sign.
EXAMPLE 5 Operations Using Matrices
Suppose that
3 1 5
=
A
−
2 0 6
Find
(a) 4A
SOLUTION
Type everything as seen in Figure 12 on page 755.
EXAMPLE 13 Finding the Inverse of a Matrix
The matrix
4 1
0
=
B
−
8 1
3
1
(b)
C
3
9
0
=
C
−
3 6
(c) 3A - 2B
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