Re: Help needed with csolve function on the 92
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Re: Help needed with csolve function on the 92
enter: csolve((-3+i)x^2+(5i-1)x+2=0,x)
returns: x= 1/5 + 2/5i or x=-1+i
check these by typing (-3+i)x^2+(5i-1)x+2|x=-1+i
or (-3+i)x^2+(5i-1)x+2|x=x= 1/5 + (2/5)i
Your probably did not use the script i, the second function on the qwerty i.
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Ben Sultenfuss <bsultenfuss@sfasu.edu>
Stephen F. Austin State University
Department of Mathematics and Statistics
1936 North Street
PO Box 13040, SFA Station
Nacogdoches, Texas 75962-3040
Phone: Office: 409-468-3805 Home: 409-560-5508
Fax: Office: 409-468-1669 Home: 409-560-0038
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From: Alexis <Vanpir@SKYNET.BE>
To: CALC-TI@LISTS.PPP.TI.COM
Subject: Help needed with csolve function on the 92
Date: Friday, September 12, 1997 11:06
Hello !
Yesterday I had to solve the following equation :
(-3+i)x²+(5i-1)x+2=0
I tried it with the csolve fucntion and all I got was an approximation. I
thus tried to use the well known quadratic formula within a function
(-b+/-sqr(b²-4ac)/2a) and I got the exact answer. How is that possible ?
Doesn't the 92 use this formula to solve that kind of equation ?
Anyway, I'd like to write a function that would extract the a,b and c from
a quadratic equation and display the solutions as a list but I can't figure
how to extract the coefs. Has anyone an idea ?
TIA
Alexis
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