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Step & Key Operation Display
Notes
EL-9900 Graphing Calculator
Matrix multiplication can
be performed if the num-
ber of columns of the first
matrix is equal to the num-
ber of rows of the second
matrix. The sum of these
multiplications (1
.
1 + 2
.
4
+ 1
.
7) is placed in the 1,1
(first row, first column) po-
sition of the resulting ma-
trix. This process is re-
peated until each row of A
has been multiplied by
each column of B.
Enter a 3x 3 matrix B.
2
Multiply the matrices A and B
together at the home screen.
3-1
Delete the input matrices for
future use.
3-2
8-1
Matrix multiplication can be performed easily by the calculator.
MATRIX
MATRIX MATRIX
X
B23
3
12
3
456
78
9
A1
A
2
C
2
2nd F
QUIT
2nd F
OPTION
ENTER
ENTER
ENTER ENTER ENTER
ENTER
ENTER
ENTER
ENTER ENTER ENTER
ENTER
ENTER
ENTER
2nd F
2nd F
2nd F