Texas Instruments TI-83 - 11.5 Matrix Algebra; Example 3 Adding and Subtracting Matrices

32
61
A
−

=


and
42
61
B
−

=


To find the value of x, we evaluate det([B])/det([A]) as shown below:
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11.5 Matrix Algebra
EXAMPLE 3 Adding and Subtracting Matrices
Suppose that
2483
0123
A
−

=


and
3401
6820
B
−

=


Find (a) A + B (b) A - B
SOLUTION
Enter the matrices into the graphing utility. For a review of this, see Section 6.3 tutorial.
Name each matrix A and B. To add matrix A and B…
1) Press MATRX. Under the NAMES menu, select 1.[A] by pressing 1 or hitting
ENTER. You should have the following on your home screen:
2) Press +.