RE: TI-M: Equation question for TI-89
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RE: TI-M: Equation question for TI-89
using a matrix is pretty easy
make 1 matrix
-1 3
2 -5
make another
-1
3
then multiply the second one by theinverse of the first one
A^-1*B and you get your answer
-----Original Message-----
From: owner-ti-math@lists.ticalc.org
[mailto:owner-ti-math@lists.ticalc.org]On Behalf Of BG
Sent: Friday, September 15, 2000 12:39 AM
To: ti-math@lists.ticalc.org
Subject: TI-M: Equation question for TI-89
Hi everybody,
I'm new to this list. I have a question that probably has an easy
answer.
I am about 50 miles away from my TI-89's manual, so unfortunately I
can't find my answer there.
PROBLEM: how can I enter a system of equations into my TI-89 and have
it solve them?
For instance:
-1 = -1A + 3B
3 = 2A - 5B
What do A & B equal?
This is two equations with 2 unknowns. Isn't there a function to solve
this? Can't I do this with a Matrix? If so, could somebody please tell
me how to do it on a TI-89? I'm going to need to be able to do it with
3 equations and 3 unkowns, also. I have an old Casio that I can do it
on, but my 89 is a great calculator and I'd like to use it for all my
needs.
Thanks!
B. G.
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