# How would I enter the following in my TI-89...

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• Sep 9th 2007, 08:16 AM
topsquark
Quote:

Originally Posted by saber3469
how do I input the proper info on these problems on the ti-89 calculator

the square rootof 32 - the sqaure root if 50xx

how do i input the info for graphing on:

2x + 3y+=6
-8x - 12y =-24

I think you hit the "submit" button a few too many times. :)

What is 50xx?

To graph the two equations, first solve both for y. Then you go to the "y = " screen and put them into y1 and y2. Then go to your "graph" screen.

-Dan
• Sep 9th 2007, 11:08 AM
galactus
To solve your linear equation, type in

simultd([2,3;-8,-12],[6;-24]) then ENTER.

You should get Error:Singular Matrix.

That's because one is a multiple of the other. There both essentially the same.

Another way is to use RREF([2,3,6;-8,-12,-24]).

You should get a row of 0's at the bottom. That' no good.
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