Anyone here know how to use the EQN mode on the casio fx-115es plus to find solutions to a system of equations involving complex numbers? Also, if that's not possible, what about entering complex numbers to a matrix on this calculator? I haven't been able to figure it out, and searching the web hasn't returned any relevant results.
I'm guessing its possible as this calculator is allowed on the engineering FE exams. So far I've only been able to solve systems using real numbers in EQN mode, and have only been able to perform complex calculations in CMPLX mode.
Thanks.
Answer
Complex numbers are not supported—on simultaneous equations or on matrices—on the fx-115es plus scientific calculator.
Indeed, no scientific calculator (neither T.I., Sharp or Casio) supports these two kinds of problem solving in CPLX mode.
For that, you will need to choose a graphing calculator with a CAS (Computer Algebra System).
/Silicon Valley Regards
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