# Need help on TI-89 to solve Complex number

• May 14th 2008, 10:42 AM
ry4n_cruise
Need help on TI-89 to solve Complex number
I know how to use "simple" complex number on TI-89
for example: 8+i3

but how about if there is two equations and we want to solve for x and y:
for example: (1+i1.5)x + i2.5y=20 and 11x + 15y=0
solve for x and y.

Is it possible to do the calculation using solve(
I tried to do it, but I kept getting "false" answer.

Any responds would be GREATLY appreciated.

Best regards,
RC
• May 14th 2008, 10:52 AM
Moo
Quote:

Originally Posted by ry4n_cruise
I know how to use "simple" complex number on TI-89
for example: 8+i3

but how about if there is two equations and we want to solve for x and y:
for example: (1+i1.5)x + i2.5y=20 and 11x + 15y=0
solve for x and y.

Is it possible to do the calculation using solve(
I tried to do it, but I kept getting "false" answer.

Any responds would be GREATLY appreciated.

Best regards,
RC

Hello,

Did you use the special i button ?
Are x and y real numbers or complex numbers ?
What did you enter exactly ?
• May 14th 2008, 12:22 PM
ry4n_cruise
Yes, I use special i,
and I want X and Y will have answers something like a+Bi

thank you very much
• May 14th 2008, 12:25 PM
Moo
Quote:

Originally Posted by ry4n_cruise
Yes, I use special i,
and I want X and Y will have answers something like a+Bi