Texas Instruments TI-83 PLUS - Manual (Page 260)

TI-83 Plus Matrices 257
4. Press 2
Н
3
Н
3
Н to complete the
first row for X + 2Y + 3Z = 3.
5. Press 2
Н
3
Н
4
Н
3
Н to enter
the second row for 2X + 3Y + 4Z = 3.
6. Press y 5 to return to the home screen. If
necessary, press ‘ to clear the home
screen. Press y
>
~ to display the
MATRX MATH
menu. Press } to wrap to the end
of the menu. Select B:rref( to copy rref( to the
home screen.
7. Press y
>
1 to select 1: [A] from the
MATRX NAMES menu. Press ¤ Í . The
reduced row-echelon form of the matrix is
displayed and stored in
Ans .
1X N 1Z = L 3 therefore X = L 3 + Z
1Y + 2Z = 3 therefore Y = 3 N 2Z