Page 839 - Algebra 1

LAB
11
Matrix Operations
Graphing Calculator Lab (Use with Investigation 12)
You can enter and store one or more matrices in a graphing calculator. Then you can use the calculator to perform matrix operations such as addition, subtraction, and scalar multiplication.
Let A = ⎡⎢4 -6 ⎤ and B = ⎡⎢-3 7 ⎤. Use a graphing calculator to find ⎣23⎦ ⎣5-9⎦
A + B, A - B, and 2A.
1. Press to highlight the EDIT
menu.
2. Select 1: [A].
3. Matrix A has two rows and two columns. Press 2 2 .
4. Enter each element of matrix A, starting with the element in the first row, first column.
Press4 623.
5. Press to highlight the EDIT
menu.
6. Select 2: [B].
7. Matrix B has two rows and two columns. Press 2 2 .
8. Enter each element of matrix B, starting with the element in the first row, first column. Press
after keying in each value.
9. Press to return to the home screen.
10. FindthesumofA+B.
Press 1 2 .
T h e s u m i s A + B = ⎢⎡ 1 1 ⎤ . ⎣7 -6⎦
824 Saxon Algebra 1