Texas Instruments TI-89 Manual Book page 17

Example — Overdetermined Matrix
1. Press 3 „ and set Exact/Approx to
2. Start
3. Press
and three unknowns.
4. Enter the coefficients:
a =
1,1
= M
a
2,1
= M
a
3,1
= M
a
4,1
a =
5,1
5. Press ‡ to solve the problem. The busy indicator on the
status line displays while the solution is calculated.
The display shows
TI-89 / TI-92 Plus / Voyage™ 200 PLT Simultaneous Equation Solver App
Simultaneous Equation Solver and select
D ¸ ¸ for a problem with five equations
5 3
= M
a
9 6
1,2
a =
9 9
2,2
a =
9 4
3,2
= M
a
4 4
4,2
= M
a
1 9
5,2
No solution found
a = b1
2
1,3 1
= M
a b1
4
2,3 2
= M
a b1
9
3,3 3
a = b1
9
4,3 4
= M
a b1
7
5,3 5
.
Exact
New
=
6
= M
1
= M
7
=
7
=
8
.
.
Page 17