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. w
EXAMPLE 5 Operations Using Matrices
Suppose that
A
=
−
B
=
−
C
=
−
Find (a) 4A (b)
1
C (c) 3A - 2B
SOLUTION
Type everything as seen in Figure 12 on page 755.
EXAMPLE 13 Finding the Inverse of a Matrix
The matrix
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