hello every,

how do you solve this sets of linear and non-linear equations using ti 89:

8x-2ix+4iy=0

6y+4iy+x=8.66+5i

and

8x-2ix+i4y=0

6y+4iyx=8.66+5i

thank you all.

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- June 28th 2008, 11:54 PMMcCoyHelp
hello every,

how do you solve this sets of linear and non-linear equations using ti 89:

8x-2ix+4iy=0

6y+4iy+x=8.66+5i

and

8x-2ix+i4y=0

6y+4iyx=8.66+5i

thank you all. - June 29th 2008, 12:06 AMMoo
- June 29th 2008, 02:28 AMMcCoy
yea that's what i did before but it didn't give me an answer.it just keeps itself busy for ages but give no solutions in the end. For the last simultatenous eqn, my ti 89 titanium doesn't even attempt to sove it: it just says ''false''...that's the answer it gives. too bad.i can solve them using the traditional method of pen and paper, but it takes long time to find the solutions, esp for the last(ie the one containing a non-linear equation.) but time is money.i bought ti 89 to calculate such equations, but it just turned out to be of no help.well casio all the way!.

Thanks you very much for offering help.it's appreciated. - June 29th 2008, 02:40 AMMoo
Oi, this is because x and y are complex numbers too, I didn't notice...

So you have to use Csolve, instead of solve.

It's in F2 > A Complex > cSolve()

And it gives solutions (Wink) - June 29th 2008, 03:11 AMMcCoy
yes it works.I'm now a happy dude hehe.thank you very much for your help.I's a brilliant job